Following the drafting of the Atlantic Charter in August 1941 by British Prime Minister Winston Churchill and U.S. President Franklin Roosevelt, Churchill visited the White House for three weeks in December 1941. During the visit, the name "United Nations" was suggested by Roosevelt to Churchill to refer to the Allies of World War II. Roosevelt proposed it as an alternative to "Associated Powers", a term the U.S. used in the First World War (the U.S. was never formally a member of the Allies of World War I but entered the war in 1917 as a self-styled "Associated Power").