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.
Revolutionary Socialist Party (Peru)
Revolutionary Socialist Party (in Spanish: "Partido Socialista Revolucionario"), is a political party in Peru formed in November 1976 by a group of radical army officers who had been active in the "first phase of the revolution" under Velasco Alvarado and who subsequently advocated a return to the objectives of the 1968 coup.