The 36th Army Corps (French: 36er Corps d'Armée) was first formed in World War I.
The Corps saw service throughout the entirety of the First World War, including participating in the Battle of Passchendaele as part of the French First Army.
[1] As per the order of 25 May 1915, the 36th Army Corps was formed on 22 May 1915 with elements of the Détachement d'Armée de Belgique but did not have the organic composition of an army corps until June 1917.
Until that time, there was only one General Staff with command over the troops made available.
[2] Infantry : Cavalry : Artillery : Engineers : Notes Citations Bibliography