A practitioner of "Realpolitik", Kissinger played a prominent role in United States foreign policy between 1969 and 1977. During this period, he pioneered the policy of "détente" with the Soviet Union, orchestrated the opening of relations with China, engaged in what became known as shuttle diplomacy in the Middle East to end the Yom Kippur War, and negotiated the Paris Peace Accords, ending American involvement in the Vietnam War. Kissinger has also been associated with such controversial policies as U.S. involvement in the 1973 Chilean military coup, a "green light" to Argentina's military junta for their Dirty War, and U.S. support for Pakistan during the Bangladesh War despite the genocide being perpetrated by his allies. After leaving government, he formed Kissinger Associates, an international geopolitical consulting firm. Kissinger has written over a dozen books on diplomatic history and international relations.