Was NATO a submarine

Answer 1

If by "nato" you mean N.A.T.O., then no. NATO is the North Atlantic Treaty Organization, a military and economic alliance founded on April 4, 1949 (during the Cold War) against the Soviet Union. It included the United States and many of the non-communist countries in Western Europe. In response, many Eastern European countries with communist governments joined the Warsaw Pact. The military forces of NATO member nations (including their naval submarine forces) many times worked together on maneuvers and training exercises.