The Doctrine was exemplified by the Vietnamization process regarding South Vietnam and the Vietnam War. It also played elsewhere in Asia including Iran, Taiwan, Cambodia and South Korea. The doctrine was an explicit rejection of the practice that sent 500,000 American soldiers to Vietnam, even though there was no treaty obligation to that country. A major long-term goal was to reduce the tension between the United States and the Soviet Union and mainland China, so as to better enable the policy of détente to work.