The IV Corps of the Ottoman Empire (Turkish: 4 ncü Kolordu or Dördüncü Kolordu) was one of the corps of the Ottoman Army. It was formed in the early 20th century during Ottoman military reforms. It was disbanded at the end of World War I. Formation Order of Battle, 1911 With further reorganizations of the Ottoman Army, to include the creation of corps level headquarters, by 1911 the IV Corps was headquartered in Adrianople. The Corps before the First Balkan War in 1911 was structured as such: IV Corps, Harbiye, Adrianople (Ferik Ahmet Abuk Pasha) 10th Infantry Division, Adrianople (Mirliva Mehmet Pasha) 28th Infantry Regiment, Adrianople 29th Infantry Regiment, Cisr-i Mustafa Paşa 30th Infantry Regiment, Adrianople 10th Rifle Battalion, Adrianople 10th Field Artillery Regiment, Adrianople 10th Division Band, Adrianople 11th Infantry Division, Dedeağaç 31st Infantry Regiment, Adrianople 32nd Infantry Regiment, Dedeağaç 33rd Infantry Regiment, Dedeağaç 11th Rifle Battalion, Dedeağaç 11th Field Artillery Regiment, Dedeağaç 11th Division Band, Dedeağaç 12th Infantry Division, Gümülcine 34th Infantry Regiment, Yemen 35th Infantry Regiment, İskeçe 36th Infantry Regiment, Kırcaali 12th Rifle Battalion, Gümlücine 12th Field Artillery Regiment, Adrianople 12th Division Band, Gümlücine Units of IV Corps 4th Rifle Regiment, Yemen 4th Cavalry Brigade, Adrianople 9th Cavalry Regiment, Dimetoka 11th Cavalry Regiment, Adrianople 12th Cavalry Regiment, Adrianople 5th Cavalry Brigade, Adrianople 1st Cavalry Regiment, Adrianople 2nd Cavalry Regiment, Adrianople 5th Field Howitzer Battalion, Adrianople 2nd Horse Artillery Battalion, Adrianople 5th Mountain Artillery Battalion, Kırcaali 4th Engineer Battalion, Adrianople 4th Transport Battalion, Adrianople Border companies x 3 Medical Detachment Adrianople Fortified Zone Command, Adrianople 6th Heavy Artillery Regiment, Adrianople 7th Heavy Artillery Regiment, Adrianople 8th Heavy Artillery Regiment, Adrianople 9th Heavy Artillery Regiment, Adrianople Heavy Field Howitzer Battalion, Adrianople Engineer Battalion, Adrianople Machine-Gun companies x 5 Balkan Wars Order of Battle, October 17, 1912 On October 17, 1912, the corps was structured as follows: IV Provisional Corps (Thrace, under the command of the Eastern Army) 12th Division Izmit Redif Division, Bursa Redif Division Order of Battle, October 29, 1912 On October 29, 1912, the corps was structured as follows: IV Provisional Corps (Thrace, under the command of the First Eastern Army) 12th Division Izmit Redif Division, Çanakkale Redif Division Order of Battle, July 1913 IV Corps 29th Division, Ereğli Infantry Division, Kayseri Infantry Division World War I Order of Battle, August 1914, November 1914 In August 1914, November 1914, the corps was structured as follows: IV Corps