The royalist side received support from Saudi Arabia, while the republicans were supported by Egypt and the Soviet Union. Both foreign irregular and conventional forces were also involved. The Egyptian President, Gamal Abdel Nasser, supported the republicans with as many as 70,000 troops. Despite several military moves and peace conferences, the war sank into a stalemate. Egypt's commitment to the war is considered to have been detrimental to its performance in the Six-Day War of June 1967, after which Nasser found it increasingly difficult to maintain his army's involvement and began to pull his forces out of Yemen.
By 1970, King Faisal of Saudi Arabia recognized the republic and a truce was signed. Egyptian military historians refer to the war in Yemen as their Vietnam, and historian Michael Oren wrote that Egypt's military adventure in Yemen was so disastrous that "the imminent Vietnam War could easily have been dubbed America's Yemen."
In March 1958 Badr arrived in Damascus to tell Nasser of Yemen's adherence to the UAR. However, Ahmad was to keep his throne and his absolute power, and the arrangement constituted only a close alliance. In 1959 Ahmad went to Rome to treat his arthritis, rheumatism, heart trouble and reportedly drug addiction. This was followed by fights between tribal chieftains, and Badr unsuccessfully tried to buy off the dissidents by promising "reforms", including the appointment of a representative council, more army pay and promotions. Upon his return, Ahmad swore to crush the "agents of the Christians". He ordered the decapitation of one of his subjects and the amputation of the left hand and right foot of 15 others, in punishment for the murder of a high official the previous June. Badr was only rebuked for his leniency, but the Yemeni radio stopped broadcasting army officers' speeches, and talks of reforms were silenced.
In June 1961, Ahmad was still recovering from an assassination attempt four months earlier, and moved out of the capital, Taiz, into the pleasure palace of Sala. Already Defense and Foreign Minister, Badr became acting Prime Minister and Interior Minister as well. Despite being Crown Prince, Badr still needed to be picked by the Ulema in San'a. Badr was not popular with the Ulema due to his association with Nasser, and the Ulema had refused Ahmad's request to ratify Badr's title.
Imam Ahmad died on September 18, 1962, and was succeeded by his son, Imam Badr. One of Badr's first acts was to appoint Colonel Abdullah Sallal, a known socialist and Nasserist, as commander of the palace guard.
Nasser had looked to a regime change in Yemen since 1957 and finally put his desires into practice in January 1962 by giving the Free Yemen Movement office space, financial support, and radio air time. Anthony Nutting's biography of Gamal Abdel-Nasser identifies several factors that led the Egyptian President to send expeditionary forces to Yemen. These included the unraveling of the union with Syria in 1961, which dissolved his United Arab Republic (UAR), damaging his prestige. A quick decisive victory in Yemen could help him recover leadership of the Arab world. Nasser also had his reputation as an anti-colonial force, setting his sights on ridding South Yemen and its strategic port city of Aden, of British forces.
Mohamed Heikal, a chronicler of Egyptian national policy decision making and confidant of Nasser, wrote in For Egypt Not For Nasser, that he had engaged Nasser on the subject of supporting the coup in Yemen. Heikal argued that Sallal's revolution could not absorb the massive amount of Egyptian forces that would arrive in Yemen to prop up his regime, and that it would be wise to consider sending Arab nationalist volunteers from throughout the Middle East to fight alongside the republican Yemeni forces, suggesting the Spanish Civil War as a template from which to conduct events in Yemen. Nasser refused Heikal's ideas, insisting on the need to protect the Arab nationalist movement. Nasser was convinced that a regiment of Egyptian Special Forces and a wing of fighter-bombers would be able to secure the Yemeni republican coup d'etat. Nasser's considerations for sending troops to Yemen may have included the following:
At least four plots were going on in San'a. One was headed by Lieutenant Ali Abdul al Moghny. Another one was conceived by Sallal. His plot merged into a third conspiracy prodded by the Hashid trival confederation in revenge for Ahmad's execution of their paramount sheik and his son. A fourth plot was shaped by several young princes who sought to get rid of Badr but not the imamate. The only men who knew about those plots were the Egyptian charge d'affaires, Abdul Wahad, and Badr himself. The day after Ahmad's death, Badr's minister in London, Ahmad al Shami, sent him a telegram urging him not to go to San'a to attend his father's funeral because several Egyptian officers, as well as some of his own, were plotting against him. Badr's private secretary did pass this message to him, pretending he did not understand the code. Badr may have been saved by the gathering of thousands of men at the funeral. Badr learned of the telegram only later.
A day before the coup Badr was warned by Wahad, who claimed to have information from the Egyptian intelligence service. He warned Badr that Sallal and fifteen other officers, including Moghny, were planning a revolution. Wahad's purpose was to cover himself and Egypt in case the coup failed, to prompt the plotters into immediate action, and drive Sallal and Moghny into a single conspiracy. Sallal got imamic permission to to bring in the armed forces. Then, Wahad went to Moghny, and told him that Badr had somehow discoverd the plot, and that he must act immediately before the other officers are arrested. He told him that if he could hold San'a, the radio and the airport for three days, the whole of Europe would recognize him.
Sallal ordered that the military academy in San'a go on full alert - opening all armories and issuing weapons to all junior officers and troops. On the evening of September 25, Sallal gathered known leaders of the Yemeni nationalist movement and other officers who had sympathized or participated in the military protests of 1955. Each officer and cell would be given orders and would commence as soon as the shelling of Badr's palace began. Key areas that would be secured included Al-Bashaer palace (Badr's palace); Al-Wusul palace (Reception area for dignitaries); The radio station; The telephone exchange; Qasr al-Silaah (The Main Armory); and The central security headquarters (Intelligence and Internal Security).
The revolution was carried out with 13 tanks from the Badr Brigade, six armored cars, two mobile artillery cannons, and two anti-air guns. Command and control of the forces loyal to the coup would take place at the Military Academy. A unit of revolutionary officers accompanied by tanks headed towards Al-Bashaer Palace. By microphone, they voiced an appeal to the imamate Guard for tribal solidarity and to surrender Imam Badr, who would be sent peacefully into exile. The imamate Guard refused to surrender and opened fire, prompting the revolutionary leaders to respond with tank and artillery shells. The rebels planned to deploy tanks and artillery in the coup.
The battle at the palace continued until guards surrendered to the revolutionaries the following morning. The radio station was first to fall, secured after a loyalist officer was killed and resistance collapsed. The armory was perhaps the easiest target, as a written order from Sallal was sufficient to open the storage facility, beat the royalists, and secure rifles, artillery and ammunition for the resistance. The telephone exchange likewise fell without any resistance. At the Al-Wusul Palace, revolutionary units remained secure under the guise of granting and protecting diplomats and dignitaries staying there to greet the new Imam of Yemen. By late morning on September 26, all areas of San'a were secure and the radio broadcast that Imam Al-Badr had been overthrown by the new revolutionary government in power. Revolutionary cells in the cities of Taiz, Al-Hujja and the port city of Hodeida then began securing arsenals, airports and port facilities.
Sallal had to defeat a fellow revolutionary, Al-Baidani, an intellectual holding a doctorate degree, who did not share in Nasser's vision. On September 28, the radio announced Badr's death. Sallal gathered tribesmen in San'a and proclaimed: "The corrupt monarchy which ruled for a thousand years was a disgrace to the Arab nation and to all humanity. Anyone who tries to restore it is an enemy of God and man!" By then, he had learned that Badr was still alive and had made his way to Saudi Arabia.
Egyptian General Ali Abdul Hameed was dispatched by plane, and arrived on September 29 to assess the situation and needs of the Yemeni Revolutionary Command Council. Egypt sent a battalion of Special Forces (Saaqah) on a mission to act as personal guards for Sallal. They arrived at Hodeida on October 5. Fifteen days after he had left San'a, Badr sent a man ahead to the Saudi Arabia to announce that he was alive. He then went there himself, crossing the border near Khobar, at the north-western edge of the kingdom.
The United States was concerned that the conflict might spread to other parts of the Middle East. US President, John F. Kennedy rushed off notes to Nasser, Feisal, Hussein and Sallal. His plan was that Nasser's troops should withdraw from Yemen while Saudi Arabia and Jordan halted their aid to the Imam. Nasser agreed to pull out his forces only after Jordan and Saudi Arabia "stop all aggressive operations on the frontiers". Feisal and Hussein rejected Kennedy's plan, since it would involve US recognition of the "rebels". They insisted that the US should withhold recognition of Sallal's Presidency since the Imam might still regain control of Yemen, and that Nasser had no intention of pulling out. The Saudis argued that Nasser wanted their oil fields and was hoping to use Yemen as a springboard for revolt in the rest of the Arabian peninsula. King Hussein of Jordan was also convinced that Nasser's target was Saudi Arabia's oil, and that if the Saudis went, he would be next.
Sallal declared "I warn America that if it does not recognize the Yemen Arab Republic, I shall not recognize it!". US Charge d'Affaires in Taiz, Robert Stookey, reported that the republican regime was in full control of the country, except in some border areas. However, the British government was insisting on the strength of the Imam's tribal support. A letter written by President Kennedy to Faisal dated October 25, which was kept confidential until January 1963, said: "You may be assured of full US support for the maintenance of Saudi Arabian integrity".
American jet aircraft twice staged shows of force in Saudi Arabia. The first involved six F-100 jets staging stunt-flying demonstrations over Riyadh and Jeddah; on the second, two jet bombers and a giant jet transport, while returning to their base near Paris after a visit to Karachi, Pakistan, put on a demonstration over Riyadh.
Sallal proclaimed Yemen's "firm policy to honor its international obligations", including a 1934 treaty pledging respect for Britain's Aden Protectorate. Nasser promised to "start gradual withdrawal" of its 18,000-man force, "provided Saudi and Jordanian forces also retire from border regions", but would leave his technicians and advisers behind. On December 19, the US became the 34th nation to recognize the Yemen Arab Republic. United Nations recognition followed that of the US by a day. The UN continued to consider the republic the only authority in the land and completely ignored the royalists.
Britain, with its commitment to South Arabia and its base in Aden, considered the Egyptian invasion a real threat. Recognition of the republic posed a problem to several treaties Britain had signed with the sheiks and sultans of the South Arabian Federation. Saudi Arabia urged the British to identify themselves with the royalists. On the other hand, there were some in the British Foreign Office who believed Britain could buy security for Aden by recognizing the republic. However, Britain eventually decided not to recognize. Iran, Turkey and most of western Europe also withheld recognition. The republic did receive the recognition of West Germany, Italy, Canada and Australia, as well as the remaining Arab governments, Ethiopia and the entire communist bloc.
A week after the American recognition, Sallal boasted at a military parade the republic had rockets that could strike "the palaces of Saudi Arabia", and in early January the Egyptians again bombed and strafed Najran. The US responded with another aerial demonstration over Jeddah and a destroyer joined on January 15. The US reportedly agreed to send antiaircraft batteries and radar-control equipment to Najran. In addition, Ralph Bunche was sent to Yemen, where he met with Sallal and Egyptian Field Marshall Abdel Hakim Amer. On March 6 Bunche was in Cairo, where Nasser reportedly assured him that he would withdraw his troops from Yemen if the Saudis would stop supporting the royalists.
Bunker arrived in Riyadh on March 6. Faisal refused Bunker's offer, which was also hitched to pledges of reform. The original instructions for Operation Hard-surface were that American planes would "attack and destroy" any intruders over Saudi air space, but were later changed to read that the Saudis could defend themselves if attacked. Bunker evidently stuck to the original formula and stressed that if only Faisal would halt his aid to the royalists, the US would be able pressure Nasser to withdraw. Faisal eventually accepted the offer, and Bunker went on to meet with Nasser in Beirut, where the Egyptian President repeated the assurance he had given Bunche.
The Bunche and Bunker mission gave birth to the idea of an observer mission to Yemen, which eventually became the United Nations Yemen Observation Mission. The U.N. observer team, which would be set up by the former UN Congo commander, Swedish Major General Carl Von Horn. His disengagement agreement called for (1) Establishment of a demilitarized zone extending twenty kilometers on either side of a demarcated Saudi Arabian Yemen border, from which all military equipment was to be excluded; (2) Stationing of UN observers within this zone on both sides of the border to observe, report and prevent any continued attempt by the Saudis to supply royalist forces.
On April 30, Von Horn was sent to discover what kind of force was required. A few days later, he met with Amer in Cairo and found out that Egypt had no intention of drawing all her troops from Yemen. After a few more days, he was told by the Saudi deputy Minister for Foreign Affairs, Omar Saqqaff, that the Saudis would not accept any attempt by Egypt to leave security forces after their withdrawal. Saudi Arabia had already been cutting back on its support to the royalists, in part because Egypt's projected plan for unity with Syria and Iraq made Nasser seem too dangerous. By that time, the war cost Egypt $1,000,000 a day and nearly 5,000 casualties. Though promising to remove her troops, Egypt had the privilege of leaving an unspecified number for the "training" of Yemen's republican army.
In June, Von Horn went to San'a, unsuccessfully trying to achieve the objective of 1) ending Saudi aid to the royalists, 2) creating a 25-mile demilitarized strip along the Saudi border, and 3) supervising the phased withdrawal of the Egyptian troops. In September, Von Horn cabled his resignation to Thant, who announced that the mission would continue, due to "oral assurances" by Egypt and Saudi Arabia to continue financing it. The number of Egyptian troops increased, and in the end of January, the "Hard-surface" squadron was withdrawn after a wrangle with Faisal. On September 4, 1964, the UN admitted failure and withdrew its mission.
Imam Badr led his campaign with the princes of the house of Hamid Eddin. Those included Hassan bin Yahya, who had come from New York, Mohamed bin Hussein, Mohamed bin Ismail, Ibrahim al Kipsy, and Abdul Rahman bin Yahya. At fifty-six, Hassan bin Yahya was the oldest and most distinguished. Prince Hassan was made Prime Minister and Commander-in-Chief.
In 1963 alone, the Saudis spent $15 million to equip royalist tribes, hire hundreds of European mercenaries, and establish their own radio station. Pakistan, which saw a chance to make money in the conflict, extended rifles to the royalists. Remnants of the Imam's Army also had elements of the Saudi National Guard fight alongside its ranks. Iran subsidized royalist forces on and off, as the Shah felt compelled to provide the Shiite Zeidi Imam Al-Badr with financing. The British allowed convoys of arms to flow through one of its allies in Northern Yemen, the Sheriff of Beijan, who was protected by the British administration in Aden. British military planes conduced night operations to resupply Badr's forces. The tribes of Southern Saudi Arabia and Northern Yemen were closely linked, and the Saudis enticed thousands of Yemeni workers in Saudi Arabia to assist the royalist cause. In addition to the Saudis and British, the Iraqis also sent plane loads of Baathist Yemenis to undermine Sallal's regime. The royalists fought for the Imam despite his father's unpopularity. One sheik said "The Imams have ruled us for a thousand years. Some were good and some bad. We killed the bad ones sooner or later, and we prospered under the good ones". The hill tribes were Shia, like the Imam, while the Yemenis of the coast and the south were Sunni, as were most Egyptians. President Sallal was himself a mountain Shia fighting with lowland Sunnis. Badr himself was convinced that he was Nasser's biggest target, saying "Now I'm getting my reward for befriending Nasser. We were brothers, but when I refused to become his stooge, he used Sallal against me. I will never stop fighting. I will never go into exile. Win or lose, my grave will be here".
Badr had formed two royalist armies - one under his uncle Prince Hassan in the east and one under his own control in the west. Both armies controlled most of the north and east of Yemen, including the towns of Harib and Marib. The provincial capital of Northern Yemen, Sadah, which would have given the Imam a key strategic road towards the main capital San'a, was controlled by the republicans. There were also areas like the town of Hajjah, where the royalists controlled the mountains while the Egyptians and republicans controlled the town and fortress. Mercenaries from France, Belgium and England, who had fought in Rhodesia, Malaya, Indochina and Algeria, were sent to assist the Imam in planning, training and giving the irregular forces the ability to communicate with one another and the Saudis. They trained tribesmen in the use of antitank weapons, such as the 106mm gun and in mining techniques. The numbers of mercenaries are estimated in the hundreds, although Egyptian sources at the time reported 15,000. Royalist tactics were confined to guerilla warfare, isolating conventional Egyptian and republican forces, and conducting attacks on supply lines.
Three decades after the war, former Mossad director, Shabtai Shavit, and Ariel Sharon both said Israel had been clandestinely involved in Yemen. Some of the royalist air drops were aided by the Israeli Air Force. The aircraft were contracted privately to the British mercenary operation and were either using Israeli air bases or Israeli transport planes themselves making the drops. The Israeli aircraft flew along the Saudi coastline. The Saudis did not have radar systems, and would later claim they were not aware of the airlifts. The Israeli planes would make the drops and then refuel in Djibouti and return to Israel. The airlifts were originally codenamed "Operation Gravy", but were later renamed "Operation Porcupine". The Mossad also operated several agents in Yemen. One of them, Baruch Mizrahi, was caught in 1967 and was imprisoned in Egypt. He was released in a prisoner exchange between Egypt and Israel following the Yom Kippur War.
Anwar Sadat was convinced that a regiment reinforced with aircraft could firmly secure Al-Sallal and his free officer movement, but within three months of sending troops to Yemen, Nasser realized that this would require a larger commitment than anticipated. A little less than 5,000 troops were sent in October 1962. Two months later, Egypt had 15,000 regular troops deployed. By late 1963, the number was increased to 36,000; and in late 1964, the number rose to 50,000 Egyptian troops in Yemen. In late 1965, the Egyptian troop commitment in Yemen was at 55,000 troops, which were broken into 13 infantry regiments of one artillery division, one tank division and several Special Forces as well as paratroop regiments. Ahmed Abu-Zeid, who served as Egypt's ambassador to royalist Yemen from 1957 to 1961, sent numerous reports on Yemen that did not reach Ministry of Defense officials. He warned Egyptian officials in Cairo, including Defense Minister Amer, that the tribes were difficult and had no sense of loyalty or nationhood. He opposed sending Egyptian combat forces and, arguing that only money and equipment be sent to the Yemeni Free Officers, and warned that the Saudis would finance the royalists.
All the Egyptian field commanders complained of a total lack of topographical maps causing a real problem in the first months of the war. Commanders had difficulty planning military operations effectively or sending back routine and casualty reports without accurate coordinates. Field units were given maps that were only of use for aerial navigation. Chief of Egyptian Intelligence, Salah Nasr, admitted that information on Yemen was nonexistent. Egypt had not had an embassy in Yemen since 1961; therefore when Cairo requested information from the U.S. ambassador to Yemen, all he provided was an economic report on the country.
In 1963 and 1964 the Egyptians had five squadrons of aircraft in Yemen at airfields near San'a's and Hodeida. They were using Yakovlev II piston-engined fighters, MiG-16 and MiG-17 jet fighters, Ilyushin Il-28 twin-engined bombers, Ilyushin Il-14 twin-engined transports and MiG-M.14 transport helicopters. They were also flying four-engined Tupolev bombers from bases in Egypt, such as Aswan. All the air crew were Egyptian, except for the Tupolev bombers which were thought to have mixed Egyptian and Russian personnel. The Ilyushin transports flying between Egypt and Hodeida had Russian crews. Throughout the war, the Egyptians relied on airlift. In January 1964, when royalist forces placed San'a under siege, Egyptian Antonov heavy-lift cargo planes airlifted tons of food and kerosene into the region. The Egyptians estimate that hundreds of millions of dollars were spent to equip Egyptian and republican Yemeni forces, and in addition, Moscow refurbished the Al-Rawda Airfield outside San'a. The politburo saw a chance to gain a toehold on the Arabian Peninsula and accepted hundreds of Egyptian officers to be trained as pilots for service in the Yemen War.
Egyptian air and naval forces began bombing and shelling raids in the Saudi southwestern city of Najran and the coastal town of Jizan, which were staging points for royalist forces. In response, the Saudis purchased a British Thunderbird air defense system and developed their airfield in Khamis Mushayt. Riyadh also attempted to convince Washington to respond on its behalf. President Kennedy sent only a wing of jet fighters and bombers to Dhahran Airbase, demonstrating to Nasser the seriousness of American commitment to defending U.S. interests in Saudi Arabia.
The Ramadan offensive began in February 1963 when Amer and Sadat arrived in San'a. Amer asked Cairo to double the 20,000 men in Yemen, and in early February the first 5,000 of the reinforcement arrived. On February 18 a task force of fifteen tanks, twenty armored cars, eighteen trucks and numerous jeeps took off from San'a' moving northwards, heading for Sadah. More garrison troops followed. A few days later another task force, spearheaded by 350 men in tanks and armored cars, struck out from Sadah southeastwards toward Marib. The manoeuvered into the Rub al-Khali desert, perhaps well into Saudi territory, and there they were built up by an airlift. Then they headed westwards. On February 25 they occupied Marib and on March 7 they took Harib. A royalist force of 1,500 men ordered down from Najran failed to stop them on their way out from Sadah. The royalist commander at Harib fled to Beihan, on the British-protected side of the border. In the battle of El Argoup, 25 miles southeast of San'a, 500 royalists underPrince Abdullah's commanded attacked an Egyptian position on top of a sheer-sided hill that was fortified with six Soviet T-54 tanks, a dozen armored cars and entrenched machine guns. The royalists advanced in a thin skirmish line and were plastered by artillery, mortars and strafing planes. They replied with rifles, one mortar with 20 rounds, and a bazooka with four rounds. The battle lasted a week and cost the Egyptians three tanks, seven armored cars and 160 dead. The Egyptians were now in positions from which they could hope to interdict the royalist movement of supplies in the mountains north and east of San'a'.
In the beginning of April the royalists held a conference with Faisal in Riyadh. They decided to adopt new tactics, including attempts to get supplies around the positions now held by the Egyptians by using camels instead of trucks to cross the mountains to reach the positions east of San'a. Camel caravans from Beihan would swing into the Rub al-Khali and enter Yemen north of Marib. It was also decided that the royalists must now strengthen their operations west of the mountains with three "armies". By the end of April, they began to recover and claimed to have regained some of the positions the Egyptians had taken in the Jawf, particularly the small but strategic town of Barat and Safra, both in the mountains between Sadah and the Jawf, and were able to move freely in the eastern Khabt desert. In the Jawf they claimed to have cleaned up all Egyptian strong-points except Hazm, and in the west the town of Batanah.
On June 12, Egyptian infantry numbering at about 4,000, reinforced by the republican army and mercenaries from the Aden protectorate invaded the town of Beit Adaqah, about thirty miles west of San'a, where Prince Abdullah held a front extending from the Hodeida road, through Kawakaban province, to southern Hajjah. In two days, the attackers advanced about twelve miles, before being repelled by a counter-attack. The royalists admitted about 250 casualties. Next, the Egyptians attacked Sudah, about 100 miles north-west of San'a. They used the unpopularity of the local royalist commander to bribe several local sheiks and occupied the town unopposed. After a month, the sheiks sent delegations to Badr soliciting pardons and asking for guns and money with which to fight the Egyptians. Badr sent new forces and managed to regain the surroundings of Sudah, though not the town itself.
On August 15, the Egyptians launched an offensive from their major north-western base in Haradh. They had 1,000 troops and about 2,000 republicans. The plan, as interpreted by British intelligence, seemed to have been to cut the thirty-mile track southward through the mountains from the Saudi border at Khoubah to Badr's headquarters in the Qara mountains near Washa, and then to split into two task forces, one moving east through Washa to the headquarters and the other north-eastwards along the track to the Saudi border below the Razih mountains. The Egyptians began their move on Saturday morning, moving along the Haradh and Tashar ravines. On Saturday and Sunday afteroons they were caught in heavy rain and their vehicles, including twenty tanks and about forty armored cars sank axle deep into the mud. The defenders left them alone until Monday at dawn. Badr left his headquarters at three that morning with 1,000 men to direct a counter attack in the Tashar ravine, while Abdullah Hussein attacked in the Haradh ravine.
Meanwhile, the Egyptians had planned a coordinated drive from Sadah to the southwest, below the Razih mountains, hoping to link up with the force coming from Haradh. They were counting on a local sheik, whose forces were to supposed to join 250 Egyptian parachutists. The sheik failed to deliver, and the parachutists made their way back to Sadah, suffering losses from snipers on the way. Badr had sent radio messages and summonses by runner in all directions calling for reinforcement. He asked reserve forces training in the Jawf to arrive in trucks mounting 55- and 57-millimeter cannon and 81 millimeter mortars and heavy machine guns. They arrived within forty-eight hours, in time to face the attackers. They outflanked the Egyptian columns, still stuck in mud in the ravines. They later announced they had knocked out ten of the Egyptian tanks and about half of their armored cars, and claimed to have shot down an Ilyushin bomber. The royalists also carried out two supporting movements. One was a raid on Jihana, in which several staff officers were killed. The second was an attempt to bombard San'a from a nearby mountain peak. In that operation involved British advisers and French and Belgian mercenaries from Katanga. Other diversionary operations included raids on Egyptian aircraft and tanks at the south airport of San'a and a mortar at the Egyptian and republican residence in a suburb of Taiz.
Although the Egyptians managed to drive Badr out of his headquarters to a cave on Jabal Shedah, they could not close the Saudi border. They declared victory on the radio and on the press, but were obliged to agree to a ceasefire on the upcoming Erkwit conference on November 2.
On November 2, at a secret conference in Erkwit, Sudan, the royalists and republicans declared a ceasefire effective at 1:00 PM on Monday, November 8. Tribesmen of both sides celebrated the decision until that day, and for two days after it went into effect, they fraternized several places. On November 2 and 3, nine royalists and nine republicans, with a Saudi and an Egyptian observer, worked out the terms. A conference of 168 tribal leaders was planned for November 23. For the royalists, the conference was to become an embryo national assembly that would name a provisional national executive of two royalists, two republicans and one neutral, to administer the country provisionally and to plan a plebiscite. Until that plebiscite, which would decide whether Yemen would be a monarchy or a republic, both Sallal and Badr were to step aside.
At the end of the two days the Egyptians resumed their bombing of royalist positions. The conference planned for November 23 was postponed to the 30th, then indefinitely. The republicans blamed the royalists for not arriving, while the royalists blamed the Egyptian bombings.
Between December 1964 and February 1965 the royalists discerned four Egyptian attempts to drive directly into the Razih mountains. The intensity of these thrusts gradually diminished, and it was estimated that the Egyptians lost 1,000 men killed, wounded and taken prisoner. Meanwhile, the royalists were building up an offensive.
The Egyptian line of communications went from San'a to Amran, then Khairath, where it branched off north-eastwards to Harf. From Harf it turned due south to Farah, and then South-eastwards to Humaidat, Mutamah and Hazm. From Hazm it led south-eastwards to Marib and Harib. A military convoy went over this route twice a month. Since the royalists had closed the direct route across the mountains from San'a to Marib, the Egyptians had no other way.
The royalists under the command of Prince Mohamed's objective was to cut the Egyptians' line and force them to withdraw. They intended to take over the garrisons along this line and establish positions from which they could interdict the Egyptian movement. They had prepared the attack with the help of the Nahm tribe, who tricked the Egyptians into believing that they were their allies and would take care of the mountain pass known as Wadi Humaidat themselves. The royalist deal was that the Nahm would be entitled to loot the ambushed Egyptians. The Egyptians may have suspected something was up, as they sent a reconnaissance aircraft over the area a day before the attack. The royalists thus occupied two mountains known as Asfar and Ahmar and installed 75-Millimeter guns and mortars overlooking the Wadi.
On April 15, the day after the last Egyptian convoy went through, the royalists launched a surprise attack. Both forces numbered at only a couple of thousands. The guns positioned on Asfar and Ahmar opened fire, and then the Nahm came out from behind the rocks. Finally, Prince Mohamed's troops followed. This time, the royalists' operation was fully coordinated by radio. Some of the Egyptians surrendered without resistance, others fled to Harah 800 yards to the north. Both sides brought reinforcements and the battle shifted between Harf and Hazm.
Meanwhile, Prince Abdullah bin Hassan began to raid Egyptian positions north-east of San'a at Urush, Prince Mohamed bin Mohsin was attacking the Egyptians with 500 men west of Humaidat, Prince Hassan struck out from near Sadah and Prince Hassan bin Hussein moved from Jumaat, west of Sadah, to within mortar-firing distance of the Egyptian airfield west of Sadah. Fifty Egyptians surrendered at Mutanah, near Humaidat. They were eventually allowed to evacuate to San'a with their arms. Mohamed's policy was to keep officers as prisoners for exchange, and to allow soldiers to go in return for their arms. Three to five thousand Egyptian troops in garrisons on the eastern slopes of the mountains and in the desert now had to be supplied entirely by air.
The royalist radio tried to widen the split in republican ranks by promising amnesty to all non-royalists once the Egyptians were withdrawn. Badr also promised a new form of government: "a constitutionally democratic system" ruled by a "national assembly elected by the people of Yemen a new form of government: "a constitutionally democratic system" ruled by a "national assembly elected by the people." At Sallal's request, Nasser provided him with ammunition and troop reinforcements by transport plane from Cairo.
By August, the royalists had seven "armies", each varying in strength between 3,000 and 10,000 men, with a total somewhere between 40,000 and 60,000. There were also five or six times as many armed royal tribesmen, and the regular force under Prince Mohamed. In early June they moved into Sirwah in eastern Yemen. On June 14 they entered Qaflan and on July 16 they occupied Marib. According to official Egyptian army figures, they had 15,194 killed. The war was costing Egypt $500,000 a day. The royalists had lost an estimated 40,000 dead.
In early May, Sallal fired his Premier, General Hassan Amri, and appointed Ahmed Noman in his place. Noman was considered a moderate who believed in compromise. He had resigned as president of the republican Consultative Council in December in protest against Sallal's "failure to fulfill the people's aspirations". Noman's first act was to name a new 15-man Cabinet, maintaining an even balance between Yemen's two main tribal groupings, the mountain Zeidis, who are mostly royalist, and the Shafis, who are mostly republican.
Badr and his ranking chiefs did not attend the conference, but a handful of pro-royalist sheiks were present. The conference named a committee of five tribal and four religious leaders who were charged with seeking out the "beguiled brothers", Badr and his friends. Noman's effort, including a private promise to reach a withdrawal of Egyptian troops, was backed by Nasser. Radio Cairo hailed the Khamir conference as the "dawn of a new era." Sallal called the talks "a complete success", while Badr stated that "It is essential that the conflict which has devastated our beloved country be brought to an end by peaceful negotiations between the Yemeni people themselves." However, by early June, when Noman said that Egypt's 50,000 troops would have to be replaced by a joint royalist-republican peace force, the Nasserites lost interest in the deal. After Noman flew to Cairo to protest directly to Nasser, Sallal threw seven civilian Cabinet ministers into jail. Noman resigned, saying "It is obvious that Sallal and his cronies are more interested in war than peace". Sallal soon named a new Cabinet to replace Noman's, with 13 military men and two civilians.
By August, the war was costing Nasser $1,000,000 a day, when he arrived in Jedda harbor aboard his presidential yacht Hurriah (Freedom) to negotiate with Faisal. It was Nasser's first visit to Saudi Arabia since 1956. At the request of the Egyptians, due to assassination rumors, the banners and flags normally put up to celebrate a visiting dignitary were omitted, the sidewalks were cleared of people, and the car was a special bulletproof model. On the evening of his arrival, Nasser was welcomed at a banquet and reception for 700 guests. In less than 48 hours they reached full agreement. Once the agreement was signed, Faisal embraced Nasser and kissed him on both cheeks.
The agreement provided for 1) the gradual withdrawal of the Egyptian force within a ten-month period and the cessation of all Saudi help to the royalists; and 2) the formation of a Yemen Congress of fifty, representing all factions, which would be charged with forming a transitional regime and establishing procedures for a national plebiscite to determine Yemen's future government.
In a speech on May Day, 1966, Nasser said the war was entering a new phase. He launched what he called a "long-breath strategy." The plan was to pare the army from 70,000 men to 40,000, withdraw from exposed positions in eastern and northern Yemen, and tighten the hold on particular parts of Yemen: the Red Sea coastline; a northern boundary that takes in the well-fortified town of Hajja and San'a; and the border with the South Arabian Federation, which was to become independent in 1968. Nasser insisted that attacks on Najran, Qizan and other "bases of aggression" would continue, arguing that "these were originally Yemeni towns, which the Saudis usurped in 1930."
Assistant Secretary of State for the Near East and South Asia, flew in for talks with both Faisal and Nasser. In Alexandria, Nasser refused to pull out his troops, despite the risk of losing part or all of a new $150 million US food-distribution program, and another $100 million worth of industrial-development aid. Later that month, Aleksei Kosygin counseled Nasser not to risk a stoppage of the U.S. Food for Peace program because Russia could not afford to pay the bill. The Russians were also willing to aid Nasser with arms and equipment in Yemen, but feared that a widening of the conflict to Saudi Arabia would lead to a "hot war" confrontation in the Middle East. Nasser was warned that "the Soviet Union would be displeased to see an attack on Saudi Arabia."
In October, Sallal's palace in San'a was shelled by a bazooka, and insurgents began targeting an Egyptian army camp outside the city and setting fire to Egyptian installations, killing a reported 70 Egyptian troops. Sallal arrested about 140 suspects, including Mohamed Ruwainy, the ex-Minister for Tribal Affairs, and Colonel Hadi Issa, former deputy chief of staff of the armed forces. Sallal accused Ruwainy and Issa of organizing a "subversive network seeking to plunge the country into terrorism and panic" and planning a campaign of assassination, financed by Saudi Arabia, Britain, Israel and the US. Ruwainy, Issa and five others were executed, while eight others received prison sentences ranging from five years to life.
In February, 1967, Nasser vowed to "stay in Yemen 20 years if necessary", while Prince Hussein bin Ahmed said "We are prepared to fight for 50 years to keep Nasser out, just as we did the Ottoman Turks." Tunisia broke diplomatic relations with the republic, saying that the Sallal government no longer has power to govern the country. Sallal's charge d'affaires in Czechoslovakia flew to Beirut and announced that he was on his way to offer his services to the royalists. Nasser said that "As the situation now stands, Arab summits are finished forever."
The first attack took place on June 8, 1963 against Kawma, a village of about 100 inhabitants in northern Yemen, killing about seven people and damaging the eyes and lungs of twenty-five others. This incident is considered to have been experimental, and the bombs were described as "home-made, amateurish and relatively ineffective". The Egyptian authorities suggested that the reported incidents were probably caused by napalm, not gas. The Israeli Foreign Minister, Golda Meir, suggested in an interview that Nasser would not hesitate to use gas against Israel as well.
There were no reports of gas during 1964, and only a few were reported in 1965. The reports grew more frequent in late 1966. On December 11, 1966, fifteen gas bombs killed two people and injured thirty-five. On January 5, 1967, the biggest gas attack came against the village of Kitaf, causing 270 casualties, including 140 fatalities. The target may have been Prince Hassan bin Yahya, who had installed his headquarters nearby. The Egyptian government denied using poison gas, and alleged that Britain and the US were using the reports as psychological warfare against Egypt. On February 12, 1967, it said it would welcome a UN investigation. On March 1, U Thant said he was "powerless" to deal with the matter.
On May 10, the twin villages of Gahar and Gadafa in Wadi Hirran, where Prince Mohamed bin Mohsin was in command, were gas bombed, killing at least seventy-five. The Red Cross was alerted and on June 2, it issued a statement in Geneva expressing concern. The Institute of Forensic Medicine at the University of Berne made a statement, based on a Red Cross report, that the gas was likely to have been halogenous derivatives - phosgene, mustard gas, lewisite, chloride or cyanogen bromide.
The gas attacks stopped for three weeks after the Six-Day War of June, but resumed on July, against all parts of royalist Yemen. Casualty estimates vary, and an assumption, considered conservative, is that the mustard and phosgene-filled aerial bombs caused approximately 1,500 fatalities and 1,500 injuries.
Egypt imposed higher taxes on its middle and upper classes, raised workers' compulsory monthly savings by 50%, reduced overtime pay, cut the sugar ration by a third, and curtailed practically all major industrial programs. Only military expenditures were increased, by $140 million to an estimated $1 billion. Nasser also increased the price of beer, cigarettes, long-distance bus and railroad fares and admission to movies. Egypt was losing $5,000,000 a week in revenues from the closing of the Suez Canal, on the other side of which, the Israelis were sitting on the Sinai wells that had produced half of Egypt's oil supply. Egypt's hard-currency debt was now approaching $1.5 billion and its foreign-exchange reserves were down to $100 million.
As part of the Khartoum Resolution of August, Egypt announced that it was ready to end the war in Yemen. Egyptian Foreign Minister, Mahmoud Riad, proposed that Egypt and Saudi Arabia revive their Jeddah Agreement of 1965. Faisal expressed satisfaction with Nasser's offer, and Badr promised to send his troops to fight with Egypt against Israel, should Nasser live up to the Jeddah agreement Nasser and Faisal signed a treaty under which Nasser would pull out his 20,000 troops from Yemen, Faisal would stop sending arms to Sallal, and three neutral Arab states would send in observers. Sallal accused Nasser of betrayal. Nasser unfroze more than $100 million worth of Saudi assets in Egypt, and Faisal denationalized two Egyptian-owned banks that he had taken over earlier that year.
Sallal's popularity among his troops declined, and after two bazooka attacks on his home by disaffected soldiers, he took Egyptian guards. He ordered the execution of his security chief, Colonel Abdel Kader Khatari, after Khatari's police fired into a mob attacking an Egyptian command post in San'a, and had refused to recognize the committee of Arab leaders appointed at Khartoum to arrange peace terms. He also fired his entire Cabinet and formed a new one, installing three army men in key ministries, and took over the army ministry and the foreign ministry for himself. Meanwhile, Nasser announced the release of three republican leaders who had been held prisoner in Egypt for more than a year, and who were in favor of peace with the royalists. The three were Qadi Abdul Rahman Iryani, Ahmed Noman and General Amri.
When Sallal met with Nasser in Cairo in early November, Nasser advised him to resign and go into exile. Sallal refused and went to Baghdad, hoping to get support from other Arab Socialists. As soon as he left Cairo, Nasser sent a cable to San'a, instructing his troops there not to block an attempt at a coup.
On November 5, the royalists, supported by republican tribesmen called down to San'a, moved four tanks into the city's dusty squares, took over the Presidential Palace and announced over the government radio station that Sallal had been removed "from all positions of authority". The coup went unopposed. In Baghdad, Sallal asked for political asylum, saying "every revolutionary must anticipate obstacles and difficult situations". The Iraqi government offered him a home and a monthly grant of 500 dinars.
The new republican government was headed by Qadi Abdul Rahman Iryani, Ahmed Noman and Mohamed Ali Uthman. The Prime Minister was Mohsin al-Aini. Noman, however, remained in Beirut. He was doubtful of his colleagues reluctance to negotiate with the Hamid Eddin family, preferring to expel it instead. On November 23, he resigned, and his place was taken by Hassan Amri.
Prince Mohamed bin Hussein told the country's chiefs "We have money, and you will have your share if you join us. If not, we will go on without you". The chiefs agreed to mobilize their tribes. 6,000 royalist regulars and 50,000 armed tribesmen known as "the Fighting Rifles" surrounded San'a, captured its main airport and severed the highway to the port of Hodeida, a main route for Russian supplies. In a battle twelve miles east of the capital, 3,200 soldiers of both sides were killed, and an entire republican regiment reportedly deserted to the royalists. Bin Hussein gave them an ultimatum: "Surrender the city or be annihilated".
Iryani went to Cairo for what the Egyptian official press agency called "a medical checkup". Foreign Minister Hassan Macky also left Yemen, leaving the government in charge of Amri. Amri declared a 6 p.m. curfew and ordered civilians to form militia units "to defend the republic". In Liberation Square, six suspected royalist infiltrators were publicly executed by a firing squad, and their bodies were later strung up on poles.
The republicans boasted a new air force, while the royalists claimed to have shot down a MiG-17 fighter with a Russian pilot. The US State Department said that this claim, as well as reports of twenty-four MiGs and forty Soviet technicians and pilots who had arrived in Yemen, were correct. In January, the republicans were defending San'a with about 2,000 regulars and tribesmen, plus armed townsmen and about ten tanks. They also had the backing of a score or more fighter aircraft piloted by Russians or Yemenis who passed a crash course in the Soviet Union. The city could still feed itself from the immediately surrounding countryside. Between 4,000 and 5,000 royalists suffered from republican air power, but had the advantage of high ground. However, they did not have enough ammunition, as the Saudis had halted arms deliveries after the Khartoum agreement and stopped financing the royalists after December. By February, the siege was lifted and the republicans had essentially won the war.
Meanwhile, the British had withdrawn from the Federation of South Arabia, which had now become South Yemen. In 1970, Saudi Arabia recognized the Republic, and a ceasefire was effected. By 1971, both Egypt and Saudi Arabia had disengaged from Yemen.