The Red Army counted more than 11 million men, including troopers, NCOs and officers. The huge mobilization ordered by Stalin as a reaction to the German invasion in June 1941 (Operation Barbarossa) made the Red Army the largest army in history. These models are represented with the Mosin-Nagant rifles, the Svt-40 semiautomatic rifles, and the P.P.Sh submachineguns with drum magazine.