In 1946, in the aftermath of history's most devastating war, physicist Albert Einstein decides to prevent it from ever having happened. Using a time machine he has been secretly developing in New Mexico, he travels back to 1926 and eliminates Adolf Hitler — without fully thinking through the consequences. It is now the 1950s. World War II never happened. Germany is peaceful and close with its European neighbors. The Soviet Union under Stalin is not. Emboldened by the absence of the war that previously exhausted the West, Stalin mobilizes toward the conquest of Europe. The threatened nations form the Alliance. The Great World War II has begun.