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.
In 1939, a group of scientists, many having recently arrived in the United States after fleeing Nazi persecution in Germany, informed government officials that recent experiments conducted in Germany had demonstrated the feasibility of building an atomic weapon.
This World War II timeline highlights key events from January 1944 through July 1944. On June 6, 1944, the largest seaborne invasion in history was launched, thereby turning the tide of the war. Follow the events of World War II, including the D-Day invasion.