In pre-Colombian history, the Mississippian culture declined before the arrival of the Europeans. They have distinctive culture such as developing of large earthen heaps thus create a name called Moundbuilders, growing of maize and other crops, and participating in trade.
The North Atlantic Treaty Organization was created in 1949 by the United States, Canada, and several Western European nations to provide collective security against the Soviet Union. NATO was the first peacetime military alliance the United States entered into outside of the Western Hemisphere.
