NATO was established in 1949 as a collective defense alliance between North American and European countries to protect against Soviet aggression.

The Treaty of Versailles was the main peace treaty that ended World War I. It was signed on June 28, 1919, between the Allied Powers and Germany.

The Warsaw Pact was a military alliance between the Soviet Union and its satellite states in Eastern Europe. It was formed in response to the establishment of NATO in 1949.

The NPT is an international treaty that aims to prevent the spread of nuclear weapons and nuclear technology. It was signed in 1968 and has been ratified by over 190 countries.

The ANZUS Treaty is a security alliance between Australia, New Zealand, and the United States. It was signed in 1951 and is designed to protect the security of the Pacific region.

The ABM Treaty was a bilateral treaty between the United States and the Soviet Union that limited the deployment of anti-ballistic missile (ABM) systems. It was signed in 1972 and remained in force until 2002.

CENTO was a military alliance formed in 1959 between Iran, Iraq, Pakistan, Turkey, and the United Kingdom. It was designed to protect the Middle East region from Soviet aggression.

The INF Treaty was a bilateral treaty between the United States and the Soviet Union that eliminated intermediate-range nuclear forces (INF). It was signed in 1987 and remained in force until 2019.

The Rio Pact is a military alliance between the United States, Canada, and several Latin American countries. It was signed in 1947 and is designed to protect the security of the Western Hemisphere.

START I was a bilateral treaty between the United States and the Soviet Union that reduced strategic nuclear weapons. It was signed in 1991 and remained in force until 2009.

SEATO was a military alliance between the United States, the United Kingdom, France, and several Southeast Asian countries. It was formed in 1954 to protect the region from communist aggression.

The CWC is an international treaty that bans the development, production, and use of chemical weapons. It was signed in 1993 and has been ratified by over 190 countries.

ASEAN is a regional intergovernmental organization comprising ten Southeast Asian countries. It was formed in 1967 to promote economic, political, and security cooperation among its members.

The BWC is an international treaty that bans the development, production, and use of biological weapons. It was signed in 1972 and has been ratified by over 180 countries.

AUKUS is a trilateral security pact between Australia, the United Kingdom, and the United States. It was formed in 2021 to promote cooperation on defense and security issues in the Indo-Pacific region.