Poster by Ferdinand Warren, printed by U.S. Government Printing Office
World War II began in Europe in 1939. At first, the United States did not fight in the war. In December 1941, Japan attacked an American naval base at Pearl Harbor, in Hawaii. The United States then joined the war to fight with the Allied Powers, along with Great Britain, the Soviet Union, China, and many other countries. The Allies fought against the Axis powers, which included Germany, Italy, and Japan. This poster encouraged Americans to buy war bonds from the U.S. government. This helped the government pay to fight the war without raising taxes. After the war ended, people could cash in their war bonds for money.