Pakistan was a leading member of the Central Treaty Organization (CENTO) and the Southeast Asia Treaty Organization (SEATO) from its adoption in 1954–55 and allied itself with the United States during the most of the Cold war. In 1971–72, Pakistan ended its alliance with the United States after the East-Pakistan war in which East Pakistan successfully seceded with the aid of India. The promise of economic aid from the United States was instrumental in creating these agreements. At the time the pact was adopted, Pakistan's relationship with the United States was the friendliest in Asia.