The Battle of Le Cateau was fought on the Western Front during the First World War on 26 August 1914. The British Expeditionary Force (BEF) and the French Fifth Army had retreated after their defeats at the Battle of Charleroi (21–23 August) and the Battle of Mons (23 August). The British II Corps fought a delaying action at Le Cateau to slow the German pursuit. Most of the BEF was able to continue its retreat to Saint-Quentin. Having retreated from Mons two days earlier, Le Cateau and Mons being apart, the British II Corps (General Sir Horace Smith-Dorrien) was exhausted. The corps had become separated from the rest of the BEF because of the unexpected retreat by Sir Douglas Haig, the commander of I Corps, who had fought his own rearguard action at Landrecies on 25 August. Following that engagement, where Haig had rallied his troops, revolver in hand, he succumbed to panic, writing to the French High Command about the imminent debacle. He had greatly overestimated the German numbers, was "[mentally] completely destroyed" - as described by James Edmonds, Chief of Staff of the 4th Division. Instead of reinforcing Sir Horace at Le Cateau, he opted to retreat further inland, marching for five straight days. Ignorant of the manoeuvre of I Corps, Smith-Dorrien intended to continue marching, as mentioned by Wilkinson Bird, Colonel of the Royal Irish Fusiliers. Early on 26 August Smith-Dorrien changed his mind, seeing the exhaustion of his troops and the disorder that could occur should the marching continue. Edmund Allenby, commander of the II Corps' cavalry, claimed that both his men and the horses were "almost finished" and that battle at Le Cateau was inevitable, the enemy being so close. Sir Horace agreed. At 07:00 he received a call from Henry Wilson at BEF HQ, ordering him to continue the retreat; he refused the order, confirming that the men were already fighting. On the morning of 26 August, the Germans arrived and attacked II Corps.