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 7, 1941, Japan staged a surprise attack on Pearl Harbor, decimating the US Pacific Fleet. When Germany and Italy declared war on the United States days later, America found itself in a global war.

Detailed explanation-3: -The relationship between Japan and the United States had soured in the years leading up to Pearl Harbor. This began with the Japanese invasion of Manchuria in 1931, an expansion throughout the Chinese mainland that led to the Second Sino-Japanese war between China and Japan in 1937.

Detailed explanation-4: -On December 7, 1941, a date that President Franklin D. Roosevelt claimed would “live in infamy, ” the Imperial Japanese Navy conducted a surprise aerial assault on Pearl Harbor. This unprovoked attack brought the United States into World War II, as it immediately declared war on Japan.

Detailed explanation-5: -The attack shocked the nation-and thrust the U.S. into a war it had managed to sidestep for years. The day after the attack, President Roosevelt asked Congress for a declaration of war against Japan. Calling December 7 a “date which shall live in infamy, ” he told the U.S. Congress that the nation was in grave danger.