The 5th Army was a field army of the Red Army during the Russian Civil War. The 5th Army was formed four times. The first formation was between the beginning of March 1918 and April as a reaction to the Austro-German occupation of Ukraine. The second formation was created between April 1918 and 23 June 1918 to defend Tsaritsyn, the third formation between August 16, 1918 and September 6, 1922, as a part of the Eastern Front and the fourth formation between November 16, 1922 and June 1924 in the Far East.