The 3rd Shock Army (Russian: Третья ударная армия) was a field army of the Red Army formed during the Second World War. The 'Shock' armies were created with the specific structure to engage and destroy significant enemy forces, and were reinforced with more armoured and artillery assets than other combined arms armies. Where necessary the Shock armies were reinforced with mechanised, tank and cavalry formations and units. During the Second World War, some Shock armies included armoured trains and air-sled equipped units.