The document discusses several reasons for US involvement in World War II and its actions during and after the war: 1. The US joined the war to stop German and Japanese aggression and expansion, but also had economic and imperialist motivations to reassert influence in Europe and expand its territories. 2. Historians debate whether the primary motivation was truly to stop fascism or to pursue US national interests and power. 3. The US promised to allow France to keep its colonial empire after the war, despite advocating for democracy, and also promised Arab leaders it would consult them on Palestine policy. 4. The US sought to dominate the new United Nations and did not do enough to prevent the