XXI Corps (German Empire), a unit of the Imperial German Army prior to and during World War I
United States Marine Corps | United States Army Corps of Engineers | Peace Corps | Royal Flying Corps | United States Army Air Corps | Royal Army Medical Corps | Civilian Conservation Corps | Army Air Corps | Corps of Engineers | Reserve Officers' Training Corps | Marine Corps Recruit Depot Parris Island | Commandant of the Marine Corps | Royal Army Service Corps | Royal Army Ordnance Corps | Marine Corps Base Quantico | Royal Armoured Corps | Judge Advocate General's Corps | Corps | Air Training Corps | Marine Corps Recruit Depot San Diego | Marine Corps Base Camp Lejeune | King's Royal Rifle Corps | Medical Service Corps | Marine Corps Base Hawaii | Australian and New Zealand Army Corps | Army Air Corps (United Kingdom) | Second Corps | Royal Corps of Signals | Ordnance Corps (United States Army) | German Student Corps |
On 19 September, the XXI Corps commanded by Lieutenant General Edward Bulfin had, with the support of a creeping barrage, broken through the Ottoman front line to begin the Battle of Sharon.
Together the five infantry divisions of the XXI Corps, commanded by the British Lieutenant General Sir Edward Bulfin, had an advantage of 4.4–to–1 in total numbers, and three times the defenders' heavy artillery.