Describe the origins, member countries, and primary aims of COMECON, NATO, ANZUS, and SEATO, focusing on organizations established in the 1950s.

Here is the information for the organizations established during the 1950s:

• COMECON

  • Full name: Council for Mutual Economic Assistance
  • Member countries: Soviet Union, Bulgaria, Czechoslovakia, Hungary, Poland, Romania, East Germany, Mongolia, Cuba, Vietnam.
  • Aims: To promote economic cooperation and integration among member states, primarily communist countries, as a counter to Western economic blocs.

• NATO

  • Full name: North Atlantic Treaty Organization
  • Member countries: United States, Canada, United Kingdom, France, Italy, Belgium, Netherlands, Luxembourg, Denmark, Norway, Iceland, Portugal (original 12). Greece and Turkey joined in 1952, West Germany in 1955.
  • Aims: To provide collective security against the Soviet Union and its allies, ensuring mutual defense in response to an attack by any external party.

• ANZUS

  • Full name: Australia, New Zealand, United States Security Treaty
  • Member countries: Australia, New Zealand, United States
  • Aims: To formalize a military alliance for collective security in the Pacific region, committing members to consult and act in the event of an armed attack.

• SEATO

  • Full name: Southeast Asia Treaty Organization
  • Member countries: United States, France, United Kingdom, New Zealand, Australia, Philippines, Thailand, Pakistan.
  • Aims: To provide collective defense and security against communist expansion in Southeast Asia.

• CENTO

  • Full name: Central Treaty Organization (originally known as the Baghdad Pact)
  • Member countries: United Kingdom, Turkey, Iran, Pakistan, Iraq (until 1959). The United States was an associate member.
  • Aims: To provide collective defense and security against Soviet expansion and communist influence in the Middle East.

• S-STF

  • This acronym does not correspond to a widely recognized international organization established in the 1950s in the context of the other listed Cold War alliances. It might be a typo or refer to a very specific, less prominent entity.