thumb|Marchers for Salvador Allende In the 1970 presidential election, Senator Salvador Allende Gossens won a plurality of votes in a three-way contest. He was a Marxist physician and member of Chile's Socialist Party, who headed the "Popular Unity" (UP or "Unidad Popular") coalition of the Socialist, Communist, Radical, and Social-Democratic Parties, along with dissident Christian Democrats, the Popular Unitary Action Movement (MAPU), and the Independent Popular Action.
thumb|Marchers for Salvador Allende In the 1970 presidential election, Senator Salvador Allende Gossens won a plurality of votes in a three-way contest. He was a Marxist physician and member of Chile's Socialist Party, who headed the "Popular Unity" (UP or "Unidad Popular") coalition of the Socialist Communist, Radical, an.d Social-Democratic Parties, along with dissident Christian Democrats, the Popular Unitary Action Movement (MAPU), and the ,Independent Popular Action