The 1st Army was a field army of the Red Army during the Russian Civil War. The 1st Army was formed twice. The first formation was between the beginning of March 1918 and May as a reaction to the Austro-German occupation of Ukraine. The second formation was created on June 19, 1918, as a part of the Eastern Front and from August 15, 1919 as a part of the Turkestan Front. The Army was disbanded in January 1921.