What was America's stance on World War 2?

Initially, America maintained a stance of neutrality in World War II, following its experiences in World War I and the desire to avoid entanglement in foreign conflicts. However, this changed after the attack on Pearl Harbor on December 7, 1941, which galvanized public opinion and led to a formal declaration of war against Japan. Subsequently, the U.S. joined the Allies, contributing significantly to military efforts in both the European and Pacific theaters. America's involvement played a crucial role in the eventual defeat of the Axis powers.