Events Prior to December 7, 1941

President Franklin Delano Roosevelt expressed this as "shame day" on December 7, 1941. The early morning of 7th December, the attack on Pearl Harbor was one of the most devastating failures the United States had ever experienced. In the years leading up to the attack there were many incidents that caused Japanese attacks against the United States. Some say that the president has caused the incident and pushed his US into an inevitable task of World War II.

President Franklin Delano Roosevelt declared that the day of Pearl Harbor attack on December 7, 1941 should be disgraceful. With this attack, America has completely entered the two theaters of World War II. Prior to Pearl Harbor, the United States was participating in the European war only by providing war ammunition to the UK and other European antifascist countries. The attack on Pearl Harbor also caused a panic on national security, especially on the west coast. In February 1942, just two months after the Pearl Harbor incident, President Roosevelt served as Chief of Staff and the president, who was designed to move all Japanese outside the Pacific military area including citizens and foreigners I issued Order No. 9066. Area of ​​land. The purpose of this order is to protect Japanese people from Americans suffering from strong anti-Japanese attitudes, preventing spy acts.

On December 7, 1941, Japanese Imperial Navy attacked Pearl Harbor without declaring the first war, in order to destroy the major US battle fleet. At the same time, another Japanese army attacked the Philippines and the British Empire controlled by the United States in Malaya, Singapore and Hong Kong. These attacks led America and the UK to proclaim war with Japan the next day. Four days later, when America entered the European war on December 11, 1941, Nazi Germany and Fascist Italy declared a war against the United States. Hitler chose to declare a tripartite agreement that requires Germany to follow the Declaration of Declaration of War despite the US destroyer destroyer and German U Boat in the midst of the Atlantic war. This declaration virtually terminated the American and American isolationism, responded immediately, and officially entered the European war.