What were the two major theatres of World War 2?
EUROPE AND THE PACIFIC
It depends on what time period you're referring to, as there have been at least four instances where Europe was divided in two alliances: Thirty Years' War; Europe, mainly Western Europe, was split into two sides: Protestants and Catholics. World War I; Europe was split into two major alliances: the Allies and the Central Powers. World War II; Europe was split into two major alliances: the Allies and the Axes. Cold War; Europe was split…
There were two basic theatres in World War II the US fought in. The Pacific theatre where the US Navy, Marines and Army focused on fighting Japan in island hopping. There was then the European theatre where mainly the US Army focused on fighting Italy and Germany mainly in Africa, Italy and mainland Europe.
The way states engage with one another is called an International system. The Post War International System changed after the end of World War II. There were only two major world powers left after that war. The United States and the Soviet Union. The United States still hold power as the major world superpower since the fall of the Soviet Union.