After England and France declared war on Germany, President Roosevelt declared the United States neutral but was determined to help the allied countries fight Hitler. He asked Congress to revise the Neutrality Acts to allow the US to sell weapons to allied countries. Roosevelt was re-elected in 1940 on a platform of continued support for Britain. The Lend-Lease Act allowed the US to send weapons to Britain in exchange for repayment after the war. Increasing tensions with Japan over its expansion in the Pacific and US embargoes on oil led to Japan's attack on Pearl Harbor, bringing the US into World War II.