During 1954-1975 (the Vietnam War or Second Indochina War), the Thai Government allowed the Joint United States Military Assistance Group (JUSMAG) to fund and manage the modernization of Royal Thai Air Force bases. In an unsigned agreement these airbases were to be operated by the United States Air Force for the specific purpose of attacking North Vietnam with some 500 airplanes. These bases were supplied by a Naval Base near the deep-water port of Sattahip 12 37' 42" N, 100 55' 29" E. Many American military specialists were assigned to JUSMAG-THAI in Bangkok.