Unified Socialist Party (France)
The latter was a splinter group of the French Communist Party (PCF), which had left after the 1956 inner conflict caused by the Soviet invasion of Hungary.The PSA and the UGS were splinter groups of the French Section of the Workers' International (SFIO) party, which had left due to the repressive policy of the SFIO Prime Minister Guy Mollet during the Algerian War of Independence and his support to General Charles de Gaulle's return and the advent of the Fifth Republic under the military pressure.In 1965, the PSU aligned with the SFIO and the PCF in supporting the candidacy of François Mitterrand in the presidential election.In the 1988 presidential elections, the PSU supported the communist dissident candidate Pierre Juquin, who obtained 2.1% of the votes in the first round.In 1989, PSU merged with the New Left for Socialism, Ecology and Self-management (Juquin's movement), and formed the Red and Green Alternatives (nowadays integrated in the group Les Alternatifs).