(A) Congress declared war against Japan.
(B) Japanese Americans were interned by the federal government.
(C) ** The United States was attacked at Pearl Harbor.
(D) The United States dropped an atomic bomb on both Hiroshima and Nagasaki.
EXPLANATIONS BELOW
Concept note-1: -By attacking Pearl Harbor Japan believes that it can severely cripple the U.S fleet and buy them time in the Pacific and Southeast Asia. So not only would they be able to launch their attacks without interference from the U.S they would also have time to dig in defensively and consolidate their gains.
Concept note-2: -Japan and the Path to War The attack on Pearl Harbor was a surprise, but Japan and the United States had been edging toward war for decades. The United States was particularly unhappy with Japan’s increasingly belligerent attitude toward China.
Concept note-3: -Its most significant consequence was the entrance of the United States into World War II. The US had previously been officially neutral but subsequently entered the Pacific War, the Battle of the Atlantic and the European theatre of war.
Concept note-4: -The Japanese, however, immediately followed their Pearl Harbor assault with attacks against US and British bases in the Philippines, Guam, Midway Island, Wake Island, Malaya, and Hong Kong.