A notable example of non-belligerent in an environment of total war was the United States' economic support of the Allies in World War II, prior to their entry into the war following the Japanese attack on Pearl Harbor. The economic support given by the Americans was through the Lend-Lease Program in which the United States provide the United Kingdom "all possible assistance short of war" in the words of Winston Churchill, but they remained a non-belligerent state in the war until Congress formally declared war on Japan following the attack on Pearl Harbor.