Established in 1973, the NJM issued its manifesto prior to the granting of independence to Grenada in 1974. The movement took control of the country with a successful revolution in 1979 and ruled by decree as the People's Revolutionary Government until 1983. In 1983, Bishop was killed by paramilitaries affiliated with hard-liners in his own party. This led to a military government, which was deposed by the US military in a 1983 invasion.