what was the goal of the southeast asia treaty organization (seato)?
SEATO came to an end in 1977 after just 22 years of existence. Lesson Summary. After World War II, the United States and other countries were concerned about the spread of communism around the world. On Feb. 19, 1955, the Southeast Asia Treaty Organization (SEATO) was created to help combat this spread. Of the eight member countries, only two (Thailand and the Philippines) were actually located in Southeast Asia.