GENERAL KNOWLEDGE

Detailed explanation-1: -NATO is a security alliance consisting of 30 countries from North America and Europe that were established in 1949 with the signing of the Washington Treaty.

Detailed explanation-2: -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.

Detailed explanation-3: -The Alliance is founded on the principle of collective defence, meaning that if one NATO Ally is attacked, then all NATO Allies are attacked. For example, when terrorists attacked the United States on 9/11 2001, all NATO Allies stood with America as though they had also been attacked.