The short forms Red Army and RKKA refer to the "Workers' and Peasants' Red Army"- the armed forces organized by the Bolsheviks during the Russian Civil War in 1918. This organization became the army of the Soviet Union after its establishment in 1922. "Red" refers to the blood shed by the working class in its struggle against capitalism. Soviet Union issued many stamps honoring Red Army, its victories and various war heroes, especially during World War Two: