Answer:
Mainly the Soviet Union backed the Viet Minh otherwise known as the North Vietnamese as the USSR backed many communist/socialist countries around the world in small proxy wars against the United States to try and gain influence and expand communism. So your answer would be the Union of Soviet Socialist Republics.
Answer:
After the bombing at Pearl Harbor President Roosevelt addressed Congress asking to declare war on Japan.
The Japanese bombed Pearl Harbor before America joined the war. America did not plan on joining the war, but was going to support their allies with resources. Japan had wanted exports from America, but the U.S. refused. Since the American government would not give to Japan, Japan decided to attack Pearl Harbor. This made the Americans furious as they had not yet enlisted and saw this as an act of terrorism. They immediately took action and joined the war.<span />