From the Annals of LBJ – In 1965, President Lyndon B. Johnson deployed a Marine Corps Hawk air defense missile battalion to Da Nang. LBJ sent the troops to provide protection for a U.S. airbase. This was the first commitment of American combat troops in South Vietnam and there was considerable reaction around the world to the new stage of U.S. involvement in the war. Red China and the Soviet Union threatened to intervene if the U.S. became further involved in propping up the South Vietnamese regime. In Moscow, some 2,000 demonstrators, led by Vietnamese and Chinese students, attacked the U.S. Embassy. Britain and Australia supported the U.S. action, but France called for negotiations.