NATO was formed based on which treaty?

• A. The North Atlantic Treaty
• B. The Treaty of Versailles
• C. The Treaty of Paris
• D. The Treaty of Tordesillas

Answer: (A)

The idea behind NATO’s creation is grounded in the North Atlantic Treaty, signed in 1949 in Washington, D.C. This treaty established the alliance and the principle of collective defense, meaning an attack on one member is treated as an attack on all. The other treaties listed come from different times and purposes: the Treaty of Versailles ended World War I; the Treaty of Paris refers to various agreements in different eras; and the Treaty of Tordesillas divided new lands between Spain and Portugal in 1494. So the North Atlantic Treaty is the foundation for NATO.