The North Atlantic Treaty Organization NATO was established in

NATO was established in 1949 as a military alliance among Western nations in response to the growing influence of the Soviet Union. Its founding members included the United States Canada and several European states. Article 5 of the NATO treaty states that an attack on one member is considered an attack on all. This principle of collective defense became the backbone of NATO operations. Over time NATO expanded to include new members and adapted to modern security threats. It has been involved in peacekeeping counter terrorism and crisis management. The correct answer is option B which is 1949.