<span>It is to defend the collective security of member states. Your very welcome on this!</span>
Answer:
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The United States has the largest Christian population in the world, followed by Brazil, Mexico, Russia, and the Philippines.
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 />
In world war 2 computers were invented to help with aircrafts and other things. They were about the size of a whole room and now are very much faster and smaller.