XX Corps Yirminci Kolordu
Active	1916–
Country	Ottoman Empire
Type	Corps
Patron	Ottoman Sultan
Engagements	Macedonian Front (World War I) Sinai and Palestine Campaign (World War I) Battle of Jerusalem Battle of Megiddo
Commanders
Notable commanders	Mirliva Abdul Kerim Pasha Mirliva Ali Fuad Pasha (June 30, 1917-June 26, 1920^[1])

The XX Corps of the Ottoman Empire (Turkish: 20 nci Kolordu or Yirminci Kolordu) was one of the corps of the Ottoman Army. It was formed during World War I.

World War I

In December 1916, the corps was structured as follows:^[2]^[3]

In August 1917, the corps was structured as follows:^[6]

XX Corps (Syria-Palestine), Commander was Ali Fuat Cebesoy
- 16th Division, 54th Division

In June 1918, September 1918, the corps was structured as follows:^[7]

After Mudros

In November 1918, the corps was structured as follows:^[8]

In January 1919, the corps was structured as follows:^[9]^[10]

XX Corps (Anatolia, Ereğli)
- 23rd Division (Afyon)
  - 3rd Infantry Regiment, 58th Infantry Regiment, 143rd Infantry Regiment
- 24th Division (Ereğeli)
  - 69th Infantry Regiment, 89th Infantry Regiment, 159th Infantry Regiment

^ T.C. Genelkurmay Harp Tarihi Başkanlığı Yayınları, Türk İstiklâl Harbine Katılan Tümen ve Daha Üst Kademelerdeki Komutanların Biyografileri, Genkurmay Başkanlığı Basımevi, Ankara, 1972, p. 154. (in Turkish)
^ İsmet Görgülü, On Yıllık Harbin Kadrosu: 1912 - 1922 (Balkan-Birinci Dünya ve İstiklâl Harbi), Türk Tarih Kurumu, 1993, p. 183. (in Turkish)
^ Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, ISBN 0-313-31516-7, p. 154.
^ [1] turkeyswar, Campaigns, Macedonia front.
^ [2] turkeyswar, Campaigns, Macedonia front.
^ Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, ISBN 0-313-31516-7, p. 170.
^ Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, ISBN 0-313-31516-7, p. 188, 197.
^ Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, ISBN 0-313-31516-7, p. 202.
^ Edward J. Erickson, Order to Die: A History of the Ottoman Army in the First World War, Greenwood Press, 2001, ISBN 0-313-31516-7, p. 209.
^ Zekeriya Türkmen, Mütareke Döneminde Ordunun Durumu ve Yeniden Yapılanması (1918-1920), Türk Tarih Kurumu Basımevi, 2001, ISBN 975-16-1372-8, p. 326.

v t e Ottoman Forces during World War I
Army groups	Yildirim Caucasus Eastern
Armies	1st 2nd 3rd 4th 5th 6th 7th 8th 9th
Corps	I II III IV V VI VII VIII IX X XI XII XIII XIV XV XVI XVII XVIII XIX XX XXI XXII XXV Iraq Area Halil I Caucasian II Caucasian Hejaz
Fortified areas	Dardanelles Bosphorus Chataldja Adrianople Smyrna Erzurum Kars
Infantry divisions	1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 1 Caucasian 2 Caucasian 3 Caucasian 5 Caucasian 9 Caucasian 10 Caucasian 11 Caucasian 36 Caucasian 37 Caucasian
Other divisions	1 Cavalry 2 Cavalry 3 Cavalry Van Gendarmerie
Others	1st Expeditionary Force 5th Expeditionary Force German Asia Corps Africa Hejaz Expeditionary Force 1st Provisional Force 2nd Provisional Force Islamic Army of the Caucasus 57 Rgt. 177 Rgt.