In the late 1930s, as war began in Asia and Europe, the U.S. government pursued a policy of neutrality to avoid getting involved in the conflict. The U.S. government took several measures to maintain neutrality, including passing neutrality laws, issuing neutrality proclamations, supporting international peace efforts, and increasing military preparedness. Despite these efforts, the U.S. was drawn into World War II following the attack on Pearl Harbor in December 1941.