See B. H. L. Hart, Foch, the Man of Orléans (1932); C. Bugnet, Foch Speaks (tr. 1929).
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He advocated peace terms that would make Germany unable to ever pose a threat to France again. His words after the Treaty of Versailles, "This is not a peace. It is an armistice for 20 years" would prove prophetic.
Foch enlisted in the French 4th Infantry Regiment, in 1870, during the Franco-Prussian War, and decided to stay in the army after the war. In 1871, Foch entered the École Polytechnique and received his commission as a Lieutenant in the 24th Artillery Regiment, in 1873, despite not having the time to complete his course due to the shortage of junior officers. He rose through the ranks, eventually reaching the rank of Captain before entering the Staff College in 1885. In 1895, he was to return to the College as an instructor and it is for his work here that he was later acclaimed as "the most original military thinker of his generation". Turning to history for inspiration, Foch became known for his critical analyses of the Franco-Prussian and Napoleonic campaigns and of their relevance to the pursuit of military operations in the new century. His re-examination of France's painful defeat in 1870 was among the first of its kind.
In his career as instructor Foch created renewed interest in French military history, inspired confidence in a new class of French officers, and brought about "the intellectual and moral regeneration of the French Army". His thinking on military doctrine was shaped by the unshakeable belief, uncommon at the time, that "the will to conquer is the first condition of victory." Collections of his lectures, which reintroduced the concept of the offensive to French military theory, were published in the volumes "Des Principes de la Guerre" ("On the Principles of War") in 1903, and "De la Conduite de la Guerre" ("On the Conduct of War") in 1904. Sadly, while Foch advised "qualification and discernment" in military strategy and cautioned that "recklessness in attack could lead to prohibitive losses and ultimate failure, his concepts, distorted and misunderstood by contemporaries, became associated with the perverse offensive doctrines (l'offensive à outrance) of his successors. To Foch's regret, the cult of the offensive came to dominate military circles, and Foch's books were even cited in the development of Plan XVII, the disastrous French strategy for war with Germany that brought France so close to ruin in 1914.
Foch continued his initially slow rise through the ranks, being promoted to Lieutenant-Colonel in 1898. Thereafter, his career accelerated and he returned to command in 1901, when he was posted to a regiment. He was promoted to become a Colonel in 1903, then Brigadier General (Général de Brigade) in 1907, returning to the Staff College as Commandant from 1907–1911. In 1911 he was promoted Major General (Général de Division) and then Lieutenant General (Général de corps d’Armée) in 1913, taking command of XXe Corps at Nancy.
On the outbreak of the war, Foch was in command of XX Corps, part of the Second Army of General de Castelnau. On 14 August the corps advanced towards the Sarrebourg-Morhange line, taking heavy casualties in the Battle of the Frontiers. The defeat of XV Corps to its right forced Foch into retreat. Foch acquitted himself well, covering the withdrawal to Nancy and the Charmes Gap, before launching a counter-attack that prevented the Germans from crossing the Meurthe.
He was then selected to command the newly formed Ninth Army, which he was to command during the First Battle of the Marne and the Race to the Sea. With his Chief of Staff Maxime Weygand, Foch managed to do this while the whole French Army was in full retreat. Only a week after taking command of 9th Army, he was forced to fight a series of defensive actions to prevent a German breakthrough. It was then that he spoke the famous words: "Hard pressed on my right. My center is yielding. Impossible to maneuver. Situation excellent. I attack." His counter-attack was an implementation of the theories he had developed during his staff college days, and succeeded in stopping the German advance. Foch received further reinforcements from the Fifth Army and, following another attack on his forces, counter-attacked again on the Marne. The Germans dug in before eventually retreating. On 12 September Foch regained Marne at Châlons and liberated the city. The people of Châlons greeted as a hero the man widely believed to have been instrumental in stopping the great retreat and stabilising the Allied position. Receiving thanks from the Bishop of Châlons, Foch piously replied, "non nobis, Domine, non nobis, sed nomini tuo da gloriam." (Not unto us, o Lord, not unto us, but to Your name give glory, Psalm 115:1)
Foch's successes gained him a further promotion, on 4 October, when he was appointed assistant Commander-in-Chief with responsibility for co-ordinating the activities of the northern French armies, and liaising with the British forces. This was a key appointment as the so-called "Race to the Sea" was then in progress. Joffre had also wanted to nominate Foch as his successor "in case of accident", to make sure the job would not be given to Galliéni, but the French government would not agree to this. When the Germans attacked on 13 October, they narrowly failed to break through the British and French lines. They tried again at the end of the month during the First Battle of Ypres; this time suffering terrible casualties. Foch had again succeeded in co-ordinating a defence and winning against the odds. On 2 December 1914, King George V of the United Kingdom appointed him an honorary Knight Grand Cross of the Order of the Bath. In 1915, his responsibilities by now crystallised into command of the Northern Army Group, he conducted the Artois Offensive, and, in 1916, the French part of the Battle of the Somme. He was strongly criticised for his tactics and the heavy casualties that were suffered by the Allied armies during these battles, and in December 1916 was removed from command, by General Joffre, and sent to command in Italy; Joffre was himself sacked days later.
Just a few months later, after the failure of General Nivelle, General Pétain was appointed Chief of the General Staff; Foch hoped to succeed Pétain in command of Army Group Centre, but this job was instead given to General Fayolle. The following month General Pétain was appointed Commander-in-Chief in place of Nivelle, and Foch was recalled and promoted to Chief of the General Staff.
On 26 March 1918, Foch was appointed Allied Supreme Commander with the title of Généralissime ("supreme General") with the job of co-ordinating the activities of the Allied armies, forming a common reserve and using these divisions to guard the junction of the French and British armies and to plug the potentially fatal gap that would have followed a German breakthrough in the British Fifth Army sector. Despite being surprised by the German offensive on the Chemin des Dames, the Allied armies under Foch's command ultimately held the advance of the German forces during the great Spring Offensive of 1918 and at the Second Battle of Marne in July 1918. The celebrated phrase, "I will fight in front of Paris, I will fight in Paris, I will fight behind Paris," attributed both to Foch and Clemenceau, illustrated the Generalissimo's resolve to keep the Allied armies intact, even at the risk of losing the capital. On 6 August 1918, Foch was made Marshal of France.
Along with the British commander Field Marshal Haig, Foch planned the Grand Offensive, opening on 26 September 1918, which led to the defeat of Germany. Foch accepted the German cessation of hostilities in November, after which he refused to shake the hand of the German signatory. On the day of the armistice, he was elected to the Académie des Sciences. Ten days later, he was unanimously elected to the Académie française.
In a subsequent memorandum, Foch argued that the Allies should take full advantage of their victory by permanently weakening German power in order to prevent her from threatening France again:
However the British Prime Minister David Lloyd George and the American President Wilson objected to the detachment of the Rhineland from Germany, but agreed to Allied military occupation for fifteen years, which Foch thought insufficient to protect France.
Foch considered the Treaty of Versailles to be "a capitulation, a treason" because he believed that only permanent occupation of the Rhineland would grant France sufficient security against a revival of German aggression. As the treaty was being signed Foch said: "This is not peace. It is an armistice for 20 years".
Foch was made a British Field Marshal in 1919, and, for his advice during the Polish-Bolshevik War of 1920, as well as his pressure on Germany during the Great Poland Uprising, he was awarded with the title of Marshal of Poland in 1923.
On 1 November 1921 Foch was in Kansas City to take part in the groundbreaking ceremony for the Liberty Memorial that was being constructed there. Also present that day were Lieutenant General Baron Jacques of Belgium, Admiral David Beatty of Great Britain, General Armando Diaz of Italy and General John J. Pershing of the United States. One of the main speakers was Vice President Calvin Coolidge of the United States. In 1935 bas-reliefs of Foch, Jacques, Diaz and Pershing by sculptor Walker Hancock were added to the memorial.
Foch died on 20 March 1929, and was interred in Les Invalides, next to Napoleon and many other famous French soldiers and officers.
A statue of Foch was set up at the Compiègne Armistice site when the area was converted into a national memorial. This statue was the one item left undisturbed by the Germans following their defeat of France in June, 1940. Following the signing of France's surrender on 21 June, the Germans ravaged the area surrounding the railway car in which both the 1918 and 1940 surrenders had taken place. The statue was left standing, to view nothing but a wasteland.
A heavy cruiser and a full-size aircraft carrier were named in his honour, as well as an early district of Gdynia, Poland. The latter was, however, renamed by the Communist government after World War II. Nevertheless, one of the major avenues of the town of Bydgoszcz, located in then in the Polish corridor, holds his name -as sign of gratitude for campaigning for Free Poland. A street in Paris is named after him, Avenue Foch, one in Lyon, one in Krakow, one in Grenoble, Boulevard Marechal Foch, as are Mariscal Foch in Quito, Ecuador, Rue Foch - a luxury shopping street in downtown Beirut, Lebanon, Marshall Foch Street in the Lakeview neighborhood of New Orleans, Louisiana, the Marshall Foch Square in Leuven and Foch Avenue in Milltown, New Jersey, USA..Fochville in South Africa was also named in his honor. A statue of Foch stands near to Victoria Station in London.