Attitude of the U.S. Before Pearl Harbor. Public opinion in the United States was divided. Although most Americans favored the Allied cause, there was strong opposition to even indirect involvement in the war. The German-American Bund and the America First movement were especially active in opposing aid to the Allies. The American Communists also opposed aid—until Germany attacked the Soviet Union; then they demanded immediate intervention.
This World War II timeline covers events from June to September 1945. In order to force Japan to surrender, President Truman gave the command to drop two atomic bombs on Japanese cities. Follow the events that led to Japan's surrender and the end of World War II.
Decision to Invade. The decision to invade France came only after long discussion and argument.