The Sixth Army of the Ottoman Empire (Turkish: Altıncı Ordu) was one of the field armies of the Ottoman Army. It was formed in the middle 19th century during Ottoman military reforms. Formations Order of Battle, 1877 In 1877, it was stationed in Baghdad. It was composed of: Infantry: Six line regiments and six rifle battalion. Cavalry: Two line regiments. Artillery: One line regiment (9 batteries). Engineer: One sapper company. Order of Battle, 1908 After the Young Turk Revolution and the establishment of the Second Constitutional Era on July 3, 1908, new government initiate a major military reform. Army headquarters were modernized. Its operational area was Mesopotamia. It commanded the following active divisions: The Sixth Army also had inspectorate functions for four Redif (reserve) divisions: Sixth Army 11th Infantry Division (On Birinci Fırka) 12th Infantry Division (On İkinci Fırka) 6th Infantry Division (Altıncı Fırka) 15th Artillery Brigade (On Beşinci Topçu Tugayı) Redif divisions of the Sixth Army (name of the division denotes its location) 21st Baghdad Reserve Infantry Division (Yirmi Birinci Bağdad Redif Fırkası) 22nd Basra Reserve Infantry Division (Yirmi İkinci Basra Redif Fırkası) 23rd Kelkit Reserve Infantry Division (Yirmi Üçüncü Kelkit Redif Fırkası) 24th Musul Reserve Infantry Division (Yirmi Dördüncü Musul Redif Fırkası) World War I Order of Battle, August 1914 In August 1914, the army was structured as follows: Sixth Army (Commander: Cavit Pasha) XII Corps 35th Division, 36th Division XIII Corps 37th Division Order of Battle, Late April 1915 In late April 1915, the army was structured as follows: Sixth Army 35th Division Provisional Infantry Division Order of Battle, Late Summer 1915 In late Summer 1915, the army was structured as follows: Sixth Army Iraq Area Command XIII Corps 35th Division, 38th Division XVIII Corps 45th Division Order of Battle, January 1916 In January 1916, the army was structured as follows: Sixth Army Iraq Area Command XIII Corps 35th Division, 52nd Division XVIII Corps 45th Division, 51st Division Order of Battle, August 1916 In August 1916, the army was structured as follows: XIII Corps 2nd Division, 4th Division, 6th Division XVIII Corps 35th Division, 45th Division, 51st Division, 52nd Division Order of Battle, December 1916 In December 1916, the army was structured as follows: XIII Corps 2nd Division, 4th Division, 6th Division XVIII Corps 45th Division, 51st Division, 52nd Infantry Division Order of Battle, August 1917, January 1918, June 1918 In August 1917, January, June 1918, the