When the Soviets went back in time to eliminate Albert Einstein, they accidentally made uncountable and unintended alterations to the Timeline, which had many severe consequences, as the Soviets found out to their cost. Among them was the creation of the Empire of the Rising Sun and the fact that there were no such thing as nuclear weapons in this timeline. Einstein had played a vital part in the development of nuclear technology, with his theories and studies. As such, the Union's finest minds have instead developed and deployed stockpiles of this new superweapon, the Vacuum Imploder, to be the Soviet's main superweapon.