+**Nato** (North Atlantic Treaty Organization) is an intergovernmental [military alliance](/wiki/military_alliance) established in 1949. It primarily unites nations across [North America](/wiki/north_america) and Europe, ensuring a system of collective defense where an attack against one is considered an attack against all.
+## See also
+- [Collective Defense](/wiki/collective_defense)
+- [Cold War](/wiki/cold_war)
+- [International Relations](/wiki/international_relations)
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