They were first deployed to help Natasha to recapture an airbase and destroy an enemy base. Later on, they were used to destroy a blockade to a Soviet base and destroy the base that captured it. Then, they helped Natasha steal blueprints for the Time Machine. They were used for the battle to defend the time machine.
The tank's design strongly resembles the IS-2 heavy tank or the T-34-85 medium tank.