WORLD 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 11, Germany and Italy, allied with Japan, declared war on the U.S. The United States had entered World War II. Japanese Admiral Isoroku Yamamoto conceived the Pearl Harbor attack and Captain Minoru Genda planned it. Two things inspired Yamamoto’s Pearl Harbor idea: a prophetic book and a historic attack.

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.