<P> Some 10,450 Filipino troops were dispatched to South Vietnam . They were primarily engaged in medical and other civilian pacification projects . These forces operated under the designation PHLCAG - V or Philippine Civic Action Group - Vietnam . More noteworthy was the fact that the naval base in Subic Bay was used for the U.S. Seventh Fleet from 1964 till the end of the war in 1975 . The Navy base in Subic bay and the Air force base at Clark achieved maximum functionality during the war and supported an estimated 80,000 locals in allied tertiary businesses from shoe making to prostitution . </P> <P> Since November 1967, Taiwan secretly operated a cargo transport detachment to assist the United States and South Vietnam . Taiwan also provided military training units for the South Vietnamese diving units, later known as the Lien Doi Nguoi Nhai (LDMN) or "Frogman unit" in English . Military commandos from Taiwan were captured by North Vietnamese forces three times trying to infiltrate North Vietnam . </P> <P> The Brazilian government of President Castelo Branco officially supported the United States's position in South Vietnam and contributed a medical team and supplies to the country--the only Latin American country to do so . </P> <P> Canada, India and Poland constituted the International Control Commission, which was supposed to monitor the 1954 ceasefire agreement . Officially, Canada did not have partisan involvement in the Vietnam War and diplomatically it was "non-belligerent" though there is evidence to the contrary . The Vietnam War entry in The Canadian Encyclopedia asserts plainly that Canada's record on the truce commissions was a pro-Saigon partisan one . </P>

What were the reasons for the us involvement in the vietnam war