The Workers' and Peasants' Red Army (RKKA), was the army and the air force of the Russian Soviet Federative Socialist Republic, and, after 1922, the Union of Soviet Socialist Republics. The army was established immediately after the 1917 October Revolution (Red October or Bolshevik Revolution). The Bolsheviks raised an army to oppose the military confederations (especially the various groups collectively known as the White Army) of their adversaries during the Russian Civil War.

The Red Army is credited as being the decisive land force in the Allied victory in the European theatre of World War II. During operations on the Eastern Front, it fought 75%–80% of the German land forces (Wehrmacht Heer and Waffen-SS) deployed in the war, inflicting the vast majority of all German losses and ultimately capturing the German capital.

New soldiers

- Rifeman
- Assault
- Engineer
- Machingunner
- AT Assault
- Officer
- NKVD Assault
- NKVD Rifleman
- Sniper
- Elite Sniper

New weapons

- Mosina Rifle
- Mosina Rifle Scoped
- SVT Rifle
- SVT Rifle Scoped
- DP-28 Machinegun
- PPSH Sub-machinegun
- TT pistol

New vehicles

- BA64
- BT7
- SU-76
- KV1