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National Debt
National Security Adviser
National Security Agency
NATO
Naturalization
Necessary and Proper Clause
Neoclassical Economics
Neoconservative
NRCC
NRSC
Nuclear NonProliferation Treaty
NATO
The North Atlantic Treaty Organization was formed in 1949 to defend the collective security of its member nations by both political and military means. Headquartered in Brussels, Belgium, the group was formed in response to the growing threat and spread of Communism. 

Currently, NATO consists of 26 member countries from North America and Europe, and it works primarily in crisis management and peace-keeping roles around the world. NATO also has 23 partner nations with whom it works to develop and recruit forces that could work alongside NATO troops on peacekeeping missions.