 President William Howard Taft viewed "Dollar Diplomacy" as a way for American corporations to benefit while assisting in the national security goal of preventing European powers from filling any possible financial or power vacuum.During the Second World War, the United States sent troops to fight in both Europe and the Pacific.The U.S. was a key participant in many battles, including the Battle of Midway, the Normandy landings, and the Battle of the Bulge.