The Japanese were incensed by the embargo and Japanese leaders became determined to attack the United States unless it lifted the embargo. The Roosevelt administration was unwilling to reverse the policy, and Secretary of State Hull blocked a potential summit between Roosevelt and Prime Minister Fumimaro Konoe. After diplomatic efforts to end the embargo failed, the Privy Council of Japan authorized a strike against the United States. The Japanese believed that the destruction of the United States Asiatic Fleet (stationed in the Philippines) and the United States Pacific Fleet (stationed at Pearl Harbor in Hawaii) was vital to the conquest of Southeast Asia. On the morning of December 7, 1941, the Japanese struck the U.S. naval base at Pearl Harbor with a surprise attack, knocking out the main American battleship fleet and killing 2,403 American servicemen and civilians. At the same time, separate Japanese task forces attacked Thailand, British Hong Kong, the Philippines, and other targets. Roosevelt called for war in his "Infamy Speech" to Congress, in which he said: "Yesterday, December 7, 1941—a date which will live in infamy—the United States of America was suddenly and deliberately attacked by naval and air forces of the Empire of Japan." In a nearly unanimous vote, Congress declared war on Japan. After the Japanese attack at Pearl Harbor, antiwar sentiment in the United States largely evaporated overnight. On December 11, 1941, Hitler and Mussolini declared war on the United States, which responded in kind.