Question

Which of the following enabled the United States to establish a permanent military presence on the Asian mainland?

the Korean War
the Potsdam Conference
the use of atomic weapons against Japan <---- ?
the formation of the South East Asian Treaty Organization

Answer 1

It was mainly "the Potsdam Conference" that enabled the United States to establish a permanent military presence on the Asian mainland, since this decided which Allies would have access to "which" part of the world.