When you are the Soviets, you must find an Allied MCV. You build up the Chronosphere and the Iron curtain Device. When they are charged up you must build a kirov and when the roof of the War Factory is open you click the chronosphere above the War Factory and send it to the opponent (quickly). When the Kirov is teleported you must activate the iron curtain on the Kirov Airship. And you have an invincible Kirov. Destroy everything!.