The 4th Army Corps of the French Army was formed in 1873 at Le Mans under Général Édouard-Jean-Étienne Deligny. On mobilisation in 1914, it came under control of the Third Army and comprised the 7th and 8th Infantry Divisions. The 7th Inf Div consisted of the 13th Brigade with the 101st and 102nd Infantry Regiments and the 14th Inf Bde with the 103rd and 104th Infantry Regiments. Also part of the Division was a squadron of the 14th Régiment de hussards, the 25e régiment d'artillerie de campagne, and the 1st Engineer Regiment.