Earlier in that year Queen Elizabeth I of England had been troubled over the choice of a military commander for Ireland, at a time when her court was dominated by two factions - one led by Essex, the other by her principal secretary, Sir Robert Cecil. At the end of a hard faction-fight, Essex found himself with no choice but to accept the command, and the ensuing campaign failed in its objective. Essex returned to England in disgrace and made a treasonable challenge to crown authority, for which he was put to death in 1601.
In April 1598, Burghley confronted Essex for the last time in the council chamber. Essex denounced peace with Spain as dishonourable, but Burghley interrupted him, saying that, "he breathed forth nothing but war, slaughter and blood", and then pointed to the twenty third verse of Psalm 55 in his prayerbook: "Bloodthirsty and deceitful men shall not live out half their days."
In an infamous incident during a debate at the council board over the appointment of the new military commander for Ireland, the queen lost her temper and gave Essex a box on the ear, and he in response laid his hand on the hilt of his sword. Soon after, Burghley died, and ten days later the Crown forces in Ireland were heavily defeated at the Battle of the Yellow Ford. To complicate matters, King Phillip II of Spain died some days after.
Essex and the younger Cecil each tried to diminish the other's influence at court by proposing the appointment (and therefore removal from court) of members of the opposing party. The list of candidates was exhausted upon the death in Dublin of Sir Richard Bingham, and when his name was put forward by the Cecil party Essex felt bound to offer his services. With some hesitation the queen accepted the offer and formally opted for Essex as her lord lieutenant of Ireland, whereupon he triumphantly announced his determination to beat O'Neill in the field.
The army was fixed at 16,000 troops, with 1,300 horse, while the rebels in arms were estimated at 20-30,000, with up to half of these operating in Ulster, where the crown's authority was confined to a few inland forts supplied by defended towns in the east. Amongst Essex's troops were 2,000 veterans from the Lowlands, led by Henry Dowcra, which it was proposed to distribute in garrisons. It was planned to send over 2,000 troops from England every three months to replace expected losses, and a regular postal service was established between Dublin and London via Holyhead.
In addition, Essex had at his command a squadron of five warships, with an assortment of fly-boats. The squadron was notionally intended for a landing at Lough Foyle in the north, but an emergency rendez-vous had been appointed at Berehaven (or Baltimore) in the south, in the event of Spanish aggression. In effect, the navy was to be confined to southern waters.
Essex was to lead the largest army ever seen in Ireland, and was fully equipped with munitions, clothing, artillery, victuals and ships. Overall, the expected cost of the campaign was put at £290,000 per annum, twice that of Elizabeth's Netherlands army. Although English preparations for a broad campaign in Ireland (perhaps the greatest since the conquest of 1169) had been thorough, in the event they proved inadequate to the task.
On April 5 Essex waited at Helbry, an island off the Dee, for favourable winds in foggy conditions; a week later he sailed from Beaumaris after impatiently riding over Penmaen Mawr while bidding his ships to follow him - "the worst way and in the extremest wet that I have endured". After a violent passage, he reached Dublin on April 15th and was sworn in to office the same day, when the Archbishop of Dublin preached a notable sermon.
Within a week of his arrival, Essex had mounted a lavish pageant of English chivalry during the Garter feast at Dublin on St George's Day, 23 April. It was intended as a pointed display of the values he felt were ignored in Elizabeth's court. The Queen had chosen a muted version of the same ceremony at home, owing to the hardships of the war, and on hearing the reports from Dublin she decided to grant the masterships of wards - a significant source of wealth - to Cecil rather than Essex.
Essex was followed from England by the Earl of Kildare, with 18 of the chiefs of Meath and Fingal, but their vessel foundered in mid-channel, and all on board were lost. Arthur Chichester also landed at Dublin and went to Drogheda, where Essex followed to inspect the famous 1,200 strong Flanders regiment on parade; he charged them with his mounted staff, but the pikemen chose not to see the joke and stood firm, so that Essex had to pull his horse back on its haunches, while someone pricked him with a pike, drawing blood from his backside.
O'Neill displayed his strategic strength by stripping the lands bordering the northern Pale of all food and horses, in an attempt to forestall an expedition into Ulster; he also encouraged the White Knight and others to rebel, in order to draw off Essex to the south. O'Donnell moved into Connacht, and it was believed that O'Neill would follow and join with the White Knight in Munster.
The borders of the Pale were garrisoned with 5,000 of Essex's troops; garrisons around Cork were reinforced, and more troops were absorbed in Munster by Sir Thomas Norris (acting president of that province) and at Kilkenny by the Earl of Ormond; Sir Conyers Clifford's connacht army was also increased to 3,000.
The first significant engagement of the campaign came in the second week of May at the pass of Cashel, where Essex determined to march against rebel defences rather than make a detour. The pass was wooded and boggy, with a plashed rebel trench at either end. At the head of the advance were 40 shot and 20 swordsmen; in the face of rebel resistance, the calivermen moved to point blank range and the swordsmen jumped into the trenches on the flanks; then the vanguard moved through the calivermen in a frontal assault and pressed through to open country, where they halted until the whole column had joined them. Essex was said to have flown like lightning between the vanguard, battle and rearguard. The English admitted to the loss of three officers and several men; the rebels captured many feathered helmets, hence the name of the battle as the Pass of the Plumes. On 18 May, Essex marched to Kilkenny town with two-thirds of his force. The streets were strewn with green herbs and rushes to welcome him, and he endured some lively orations from the local dignitaries. Having met Thomas Norris, he departed the city 22 May with 2,500 foot and 300 horse and was received with jubilation at the town of Clonmel. On the river Suir, two miles below the town, the castle of Derrylare was surrendered, and Essex then fixed his sights on Cahir Castle, the strongest fortress in Ireland.
Essex had accused Lord Cahir, whose brother had custody of the castle, of collusion with the White Knight. Upon the failure of a parley for the surrender of the castle, the English took forceful action: after a cannonade that lasted for two days, the curtain wall was breached and the garrison fled. Essex entered the castle on the 29th of May - see Siege of Cahir Castle.
Essex then marched west to Limerick city, where he was well received on June 4. During this part of the march, his army was joined by a large train of baggage porters that outnumbered the fighting men two-to-one and remained a drain on resources throughout the campaign. At Askeaton (the centre of resistance to the crown in the Desmond rebellion 15 years previously) the army was revictualled, after an encounter with the Sugán Earl, a pretender to the Earldom of Desmond, who had shown himself at Adare with 2-3,000 men.
Essex decided to march south in an effort to draw the Munster rebels into battle, having realised that they would not allow themselves to be trapped between his army and the sea. At Kilmallock, he consulted the president, Thomas Norris. By this time, it was reported that the soldiers "went so coldly on" that Essex had to reproach their baseness. There was no money, no magazine, no remnant of victual from the crown stores, and cows enough for only two days, ammunition for only three. The army marched further south, while Essex went to Mallow on a mission to procure supplies. He rejoined his men with a MacCarthy ally, but by the time they reached the heart of Desmond rebel country, the Sugán Earl had gone into the field.
The river Blackwater was forded at Affane, and at a council of war in Essex's tent Norris was allowed 1,100 foot and a company of horse to pursue the war in Munster. Essex marched unhindered eastward through Lord Power's country to Waterford city, where he was received with two Latin orations and a joyful concourse of people on 21 June. The army was then ferried out of Munster and back into Leinster, an operation which took a frustrating length of time. Essex himself left Waterford on 22 June.
At the end of 8 weeks of marching, Essex could barely muster 300 horsemen. Not a single rebel commander had submitted to the crown, and no district was left subdued. A significant number of troops had been left in garrisons throughout Leinster and Munster, and the fighting capability of the army was much reduced because of disease and desertion. At the same time, Essex was being discredited at court for having effected badly needed defensive measures, at a time when the Armada scare of that summer was at its height in England
A second offensive into Offaly went ahead, despite the queen's disapproval. Maryborough and Philipstown (where 60 men had just been lost in an ambuscade) were resupplied, by Blount and Essex respectively, around 25 July. Essex then fell into sharp fighting on the border of Westmeath with the rebel Captain Tyrrell. Clifford came from Connacht to reinforce Essex, and lost many men; but the O'Connors were surprised, with their children exposed to the full force of the crown campaign, and 500 cows were taken from them in thick woods and their corn was burned by Essex. Harrington was involved in the expedition, but again Essex had failed to draw the main rebel force into battle, and his army retired to Dublin.
Clifford returned to Connacht, where he was killed and his forces routed at the Battle of Curlew Pass. This defeat - along with that of Harrington in Wicklow - was rated by Cecil as the heaviest blow ever suffered by the English in Ireland, and Essex received the blame at court. O'Donnell and O'Neill were now free from any threat from the west, and a land-based attack northward through Armagh was rendered highly improbable..
Essex had dubbed 59 knights during the campaign - in a wilful abuse of his powers - and the queen announced that, "it is doubted that if he continues this course he will shortly bring in tag and rag, cut and long-tail, and so bring the order into contempt." But she was unable to curtail her commander and raged impotently at the dispatches from Ireland: "She walks much in her privy chamber and stamps with her feet at ill news, and thrusts her rusty sword at times into the arras in great rage." She could take no more and on July 30 ordered an immediate assault on O'Neill.
Essex had put it about that he was in favour of immediate punitive action against the northern rebels, but he was suffering from a recurrent ailment, possibly a kidney stone. Others also had misgivings about the queen's plan of campaign, because the rebels were secure on their western front and a frontal attack to the north was considered deeply hazardous without the proposed base at Lough Foyle. A council of war accordingly declared against this course of action and, a month later, the queen delivered a furious censure to Essex, complaining bitterly that only 5,000 fighting men were available, and not twice that number.
During the summer, concerns over a rumoured Spanish landing on the Isle of Wight rendered reinforcement of the Irish army impracticable. At the same time, Archduke Albert, the Spanish governor of Flanders, seemed to be considering peace talks with England, news which would have caused Essex to suspect treason amongst the queen's councillors. Nevertheless, seven days after the controversial council of war, Essex set out for the north with the notion that, "if he [Tyrone] has as much courage as he pretendeth we will on one side or the other end the war."
Essex left Dublin on 28 August 1599, and the army was mustered three days later outside of Kells, making up 3,700 foot and 300 horse. Concerned at O'Neill's readiness to attack the Pale and Dublin if the army moved too far north, Essex wrote to the queen to say that he was weary with life, but still intended that Kells should be the frontier garrison for the coming winter. On 2 September the army marched to Ardee, where O'Neill could be seen with his army on the far side of the Lagan, "a mile and a half from our quarter, but a river and a wood between him and us". The English claimed variously that the rebel leader had 10,000 foot and 1,000 horse, or 5,000 and 700. Heeding counsel not to engage because of the inferiority of his forces, Essex embattled the army and encamped on the left bank of the Lagan. O'Neill marched on the flank, keeping to the woods, while his horse-scouts stayed within sight.
There were communications between the sides, and on 6 September Essex advanced with 2,000 foot and 300 horse. On sighting O'Neill he readied his army in the formation of a St Andrew's cross, with cavalry on either flank and to the rear. The war council hoped for an Irish attack, but determined not to take the initiative. The next day, a meeting between O'Neill and Essex was suggested by the former's envoy, to take place at the ford of Bellaclinthe on the river Glyde, and Essex was informed that the rebel leader sought the queen's mercy.
On inspection on 7 September, the proposed meeting place was rejected by Essex, but the impatient O'Neill found a spot to ride into the river up to his horse's belly. It was a gesture of humility, and Essex rode with a troop of horse to an overlooking hill before going down alone to the ford, where he conversed with O'Neill for half an hour. Both men withdrew to their companies on the hills. A formal meeting followed later, with six witnesses on either side: when the Irish were in place, Essex rode down with his men and the Irish rode into the river - again, up to their horses' bellys - while the English remained on the bank. O'Neill spoke bare-headed for a good while, saluting the viceregal party with great respect. After half-an-hour a further conference was arranged at Lagan ford for the following morning.
Essex continued his march to Drumcondra, and O'Neill returned to camp. At the conference (8 September) O'Neill was present, but not Essex. A cessation of arms was agreed for six weeks to six weeks, until May Day, either side being at liberty to break it on giving fourteen days warning, with liberty to attack O'Neill's confederates if they refused to be bound; also, restitution for all spoils within 20 days after the warning was provided for. The rebels were to hold all they then possessed, with no garrisons to be placed in new stations, free passages to be assured, all English garrisons to be apprised of the cessation, and commissioners for the borders between the English and Irish zones to be appointed. O'Neill was to ratify this on oath, Essex on his word. The terms were committed to writing and signed by O'Neill. The next day, Essex dispersed his army and went to take physic at Drogheda, and O'Neill retired with all his forces into the heart of his country.
The queen described the agreed cessation as the, "quick end made of a slow proceeding", and it was generally concluded that Essex's presence in Ireland had been superfluous from the start. Essex revealed only to the queen what had passed between him and the rebel leader, having promised to deliver the rebel request verbally. At first treason was not suspected on his part, but the queen was outspoken about O'Neill: "to trust this traitor upon oath is to trust a devil upon his religion." She ordered no ratification, nor pardon without her authority, but in time she did admit the usefulness of the cessation.
O'Neill was in two minds about the cessation, and came under pressure from O'Donnell, who argued that too much had been ceded to the English. He issued a list of demands on religious freedom and withdrawal of English influence and confirmation of lands in rebel possession - probably the bones of his private conference with Essex. There was a further parley on the Lagan in late November, when a one month extension was agreed. In December, O'Neill complained of breaches of the cessation, and in the spring of the following year, 1600, he turned south on a campaign through Munster.
Intelligence received in Spain some years later from James Blake (the supposed assassin of O'Donnell) had it "that the Earl of Essex, the same who raided Cadiz, had dealings with the Prince Onel of Ireland about causing a rising against the Queen of England, for which reason he was beheaded in England, and the said Earl employed the deponent [Blake] as intermediary between himself and the said Prince." It was also put about that O'Neill had almost persuaded Essex to leave the service of Queen Elizabeth and to join that of King Phillip to whom "they would deliver the whole kingdom"; to encourage Essex, O'Neill was said to have promised him great favour on behalf of the Spanish king, and, when Essex had expressed doubts because of "certain disservices he had done to the Crown of Spain", the rebel leader went so far as to offer him his son as a hostage in proof of his good faith.
As with so many late Elizabethan conspiracy theories, Spanish calculations were of less importance than those of the queen's councillors. At the outset in 1599, Essex had realised he was taking a risk in departing the court and leaving the field open to Cecil, a risk that would pay off only if he defeated O'Neill. The Irish experience proved far more difficult than anticipated - Essex was the last English commander of the age to underestimate rebel capability - and the situation at court deteriorated rapidly, with Cecil gaining an overwhelming influence over the queen. The private parley with O'Neill was suspicious, but probably more because of concerns over the ambition of the Scots king, James VI, to take the English throne. Essex's flight from Ireland was a desperate attempt to frustrate Cecil's plans, and once this had failed his subsequent treason was down to his refusal to accept that it was Cecil, and not he, who would determine the succession.