evidence: The standard of living in the 1970s was "extremely spartan" and discontent was rife.[146] Fidel Castro admitted the failures of economic policies in a 1970 speech.[146] In 1975, the OAS lifted its sanctions against Cuba, with the approval of 16 member states, including the United States. The U.S., however, maintained its own sanctions.[129] In 1979, the U.S. objected to the presence of Soviet combat troops on the island.[54] Following the 1983 coup that resulted in the execution of Grenadian Prime Minister Maurice Bishop and establishment of the military government led by Hudson Austin, U.S. forces invaded Grenada in 1983, overthrowing the Government. Most resistance came from Cuban construction workers, while the Grenadan People's Revolutionary Army and militia surrendered without putting up much of a fight. 24 Cubans were killed, with only 2 of them being professional soldiers, and the remainder were expelled from the island. U.S. casualties amounted to 19 killed, 116 wounded, and 9 helicopters destroyed. During the 1970s and 1980s, Castro supported Marxist insurgencies in Guatemala, El Salvador, and Nicaragua. [...] - ^ Greenberg, Jon (24 February 2020). "Fact-checking Bernie Sanders' claim on Cuba literacy under Castro". PolitiFact. Archived from the original on 20 July 2021. Retrieved 20 July 2021. [...] - ^ Valenta, Jiri (February 1981). "The Soviet-Cuban Alliance in Africa and the Caribbean". The World Today. Vol. 37. Royal Institute of International Affairs. p. 45. JSTOR 40395260.