Pakistan – United States relations refers to bilateral relationship between the Islamic Republic of Pakistan and the United States of America. The United States established diplomatic relations with Pakistan started on October 20, 1947. The relationship since then was based primarily on U.S. economic and military assistance to Pakistan. Pakistan is a Major non-NATO ally of the United States. The history of Pakistan–American relations has been defined as one of "Roller Coaster".
Military pacts and suspension of aid
Pakistan was a member of the Baghdad Pact from its adoption in 1955, until the pact's dissolution in 1979. The promise of economic aid from the U.S. was instrumental in creating the agreement. At the time the pact was adopted, Pakistan's relationship with the United States was so friendly that it was called the United States' "most-allied ally" in Asia.
During the Indo-Pakistani War of 1965, the U.S. choose not to provide Pakistan with military support as pledged in the 1959 Agreement of Cooperation. This generated a widespread feeling in Pakistan that the United States was no longer a reliable ally.