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Overview. Formed in 1949 with the signing of the Washington Treaty, NATO is a security alliance of 30 countries from North America and Europe. NATO's fundamental goal is to safeguard the Allies' freedom and security by political and military means.
Explanation:
Sorry if its wrong! ~Bread
Collective defence: The North Atlantic Treaty Organization (NATO) was founded in 1949 and is a group of 30 countries from Europe and North America that exists to protect the people and territory of its members.