The XXI Corps of the Ottoman Empire (Turkish: 21 nci Kolordu or Yirmi Birinci Kolordu) was one of the corps of the Ottoman Army. It was formed during World War I.

World War I

Order of Battle, August 1917, January 1918, June 1918 In August 1917, January 1918, June 1918, the corps was structured as follows:Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, , p. 170, 181, 188.

XXI Corps (Gallipoli) 49th Division

Order of Battle, September 1918 In September 1918, the corps was structured as follows:Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, , p. 197.

XXI Corps (Gallipoli) 49th Division

After Mudros

Order of Battle, November 1918 In November 1918, the corps was structured as follows:Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, , p. 202.

XXI Corps (Aydın) 58th Division

Sources