The US theoretically ended the world war when they dropped the
Atomic bomb on the Japanese Mainland (ended the Japanese's will to
WWII ended in Europe when the Russians captured the Reichstag, and when Canadian troops killed the last pockets of German resistance in Holland.
It ended between the Americans and the Japanese after the
Americans dropped 2 atomic bombs on the cities of Hiroshima and
There was a lot more than one person who ended WW2. In Europe it was ended by Germany's loss in The Battle of Berlin. In the Pacific, the bombings of Nagasaki and Hiroshima .
Eventually, though, it was Emperor Hirohito's decision to accept the allied terms of surrender that ended the war.