On 8 December 1941, the Pacific War broke out when Japan bombed Pearl Harbor. Curtin addressed the nation on the radio, saying, "Men and women of Australia...we are at war with Japan. This is the gravest hour of our history. We Australians have imperishable traditions. We shall maintain them. We shall vindicate them. We shall hold this country and keep it as a citadel for the British-speaking race and as a place where civilisation will persist." On 10 December, and were both sunk by Japanese bombers off the Malayan coast. Curtin cabled the President of the United States, Franklin D. Roosevelt, and Churchill on 23 December, saying, "The fall of Singapore would mean the isolation of the Philippines, the fall of the Netherlands East Indies and attempts to smother all other bases. It is in your power to meet the situation... we would gladly accept United States commanders in the Pacific area. Please consider this as a matter of urgency."