1st Army Corps (Russian Empire)

The 1st Army Corps (1-й армейский корпус) was a formation in the Imperial Russian Army, formed in the 1870s. It took part in the Russo-Turkish War of 1877–78, and later, in August 1914, the 1st Army Corps fought as part of the Second Army in the Battle of Tannenberg. There, it was defeated by the Germans along with the rest of the Second Army. During the rest of World War I, it took part in other operations, up until around 1918.

Composition
The following is a list of units that made up the 1st Army Corps at different points during its existence:

1874:
 * 1st Cavalry Division

1903:
 * 22nd Infantry Division
 * 37th Infantry Division
 * 50th Reserve Infantry Brigade

1913:


 * 22nd Infantry Division
 * 37th Infantry Division
 * 1st Mortar Artillery Division
 * 1st Saper Battalion
 * 7th Pontoon Battalion

1914:


 * 22nd Infantry Division
 * 1st Brigade
 * 85th "Vyborksky" Infantry Regiment
 * 86th "Vilmanstranski" Infantry Regiment
 * 2nd Brigade
 * 87th "Neishlotski" Infantry Regiment
 * 88th "Petrovski" Infantry Regiment
 * 22nd Artillery Brigade


 * 24th Infantry Division
 * 1st Brigade
 * 93rd "Irkutski" Infantry Regiment
 * 94th 'Eniceiski" Infantry Regiment
 * 2nd Brigade
 * 95th "Krasnoyarski" Infantry Regiment
 * 96th "Omski" Infantry Regiment
 * 24th Artillery Brigade

Commanders
Officers that commanded the corps during its existence: