GENERAL KNOWLEDGE

Detailed explanation-1: -The next day, Congress declared war. At the most extreme, no attack on Pearl Harbor could have meant no US entering the war, no ships of soldiers pouring over the Atlantic, and no D-Day, all putting ‘victory in Europe’ in doubt.

Detailed explanation-2: -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.