The document discusses the leaders of World War II: Hideki Tojo was the prime minister of Japan who allied with Hitler and oversaw the attack on Pearl Harbor; Adolf Hitler was the chancellor of Germany who started the war in Europe; Franklin Roosevelt was the U.S. president who helped Great Britain resist the Nazis; Joseph Stalin was initially allied with Hitler as dictator of the Soviet Union but joined the Allies after Germany invaded; Winston Churchill became prime minister of Britain as it fought against the Nazis and formed an alliance with the U.S.