what started the war between us and japan
attack on Pearl Harbor
title: United States declaration of war on Japan text: down the process – it was not delivered to the U.S. Secretary of State until after the Pearl Harbor attack. Following the U.S. declaration, Japan's allies, Germany and Italy, declared war on the United States, bringing the United States fully into World War II. The attack on Pearl Harbor took place before a declaration of war by Japan had been delivered to the United States. It was originally stipulated that the attack should not commence until thirty minutes after Japan had informed the US that it was withdrawing from further peace negotiations, but the attack began before the notice could title: Japan–United States relations text: between the Japan's commitment to conquer China, and America's commitment to defend China. Japan's civilian government fell and the Army under General Tojo took full control, bent on war. Japan attacked the American navy base at Pearl Harbor, Hawaii, on December 7, 1941. In response, the United States declared war on Japan. Japan's Axis allies, including Nazi Germany, declared war on the United States days after the attack, bringing the United States into World War II. The conflict was a bitter one, marked by atrocities such as the executions and torture of American prisoners of war by the Imperial Japanese title: United States declaration of war on Japan text: United States declaration of war on Japan On December 8, 1941, the United States Congress declared war () on the Empire of Japan in response to that country's surprise attack on Pearl Harbor the prior day. It was formulated an hour after the "Infamy Speech" of US President Franklin D. Roosevelt. Japan had sent a message to the United States to its embassy in Washington earlier, but because of problems at the embassy in decoding the very long message – the high-security level assigned to the declaration meant that only personnel with very high clearances could decode it, which slowed title: Japanese declaration of war on the United States and the British Empire text: as a pretext for imperialism. In response, the U.S. imposed an oil embargo on Japan in August 1941 to stop aiding their aggression in Asia and to contain Japanese actions such as their war crimes in Nanking. Japan saw this as a hostile and provocative act, and retaliated with the bombing of Pearl Harbor and the declarations of war on the US and the British Empire. Japanese declaration of war on the United States and the British Empire The declaration of war by the Empire of Japan on the United States and the British Empire was published on December 8, title: United States declaration of war on Japan text: as required by diplomatic traditions. The United Kingdom declared war on Japan nine hours before the US did, partially due to Japanese attacks on the British colonies of Malaya, Singapore, and Hong Kong; and partially due to Winston Churchill's promise to declare war "within the hour" of a Japanese attack on the United States. President Roosevelt formally requested the declaration in his Infamy Speech, addressed to a joint session of Congress and the nation at 12:30 p.m. on December 8. The declaration was quickly brought to a vote; it passed the Senate, and then passed the House at 1:10 p.m.