After the surrender of Germany and Japan, the two world powers maneuvered for decades to increase their spheres of influence around the globe, spurred on by competing ambitions and ideologies of capitalism and communism which lead to the Cold War. The Cold War was an ongoing political rivalry between the United States and the Soviet Union and their respective allies that developed after World War II. Three key features defined the Cold War: 1) the threat of nuclear war, 2) competition over the allegiance (loyalty) of newly independent nations, and 3) the military and economic support of each other's enemies around the world.
The United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki<span> on August 6 and 9, 1945, respectively, during the final stage of </span>World War II. <span>The </span>two<span> bombings, which killed at least 129,000 people, remain the only </span>use of<span> nuclear weapons for warfare in history.</span>
Answer:Sinking of American merchant ships
Explanation:In early 1917 Berlin forced the issue. Its declared decision on 31 January 1917 to target neutral shipping in a designated war-zone became the immediate cause of the entry of the United States into the war.
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