USA HISTORY

Detailed explanation-1: -On December 7, 1941, following the Japanese bombing of Pearl Harbor, the United States declared war on Japan. Three days later, after Germany and Italy declared war on it, the United States became fully engaged in the Second World War.

Detailed explanation-2: -On December 8, 1941, the United States Congress declared war ( Pub. L. 77–328, 55 Stat. 795) on the Empire of Japan in response to its surprise attack on Pearl Harbor and subsequent declaration of war the prior day.

Detailed explanation-3: -The Japanese attack on Pearl Harbor on December 7, 1941, ended the debate over American intervention in both the Pacific and European theaters of World War II. The day after the attack, Congress declared war on Imperial Japan with only a single dissenting vote.

Detailed explanation-4: -On this date, President Franklin Delano Roosevelt, addressing the nation in a Joint Session in the House Chamber, asked Congress to declare war against Japan in response to the surprise attack against American naval facilities in and around Pearl Harbor, Hawaii, a day earlier.

Detailed explanation-5: -Pearl Harbor Attack, December 7, 1941.