Institutional Revolutionary Party
The Institutional Revolutionary Party (, PRI) is a Mexican political party founded in 1929 that held uninterrupted power in the country for 71 years from 1929 to 2000, first as the National Revolutionary Party (, PNR), then as the Party of the Mexican Revolution (, PRM), and finally renaming itself as the Institutional Revolutionary Party in 1946.
Party of the Poor (Mexico)
The Party of the Poor was founded in 1967 in the Mexican state of Guerrero as a political organization. This took place in the context of the Dirty War's first beginnings, a conflict between the Institutional Revolutionary Party government and various urban and rural left-wing movements which would last roughly between the Tlatelolco massacre in October 1968 and the late 1970s, and a long period of social unrest in the country. In terms of armed conflict the PdlP was preceded by groups like the People's Guerrilla Group (1963–1965).