Mezue ahịrịokwu na-esonụ: Ntughari 1966 nke President Arturo Illia (nke UCR) site n'aka General Juan Carlos Onganía gbasasịrị Congress Argentine ma manye Armendáriz ịlaghachi n'ọrụ ahụike ya. Ọbịbịa nke ntuli aka ọhụrụ na 1972 mere ka ọ sonye na onye otu UCR Congressman Raúl Alfonsín na-eguzobe "Movement for Renewal and Change", otu ndị na-ekpe aka ekpe na-emegide onye ndu otu ahụ ogologo oge, Ricardo Balbín, onye meriri Alfonsín na mbụ nke otu ha tupu ntuli aka March 1973. Ọbụbụenyi nke Armendáriz na Alfonsín gara n'ihu n'oge nsogbu nke afọ 1970, mgbe onye nke ikpeazụ a na-eme iwu na-agbachitere ndị a tara ahụhụ n'oge ebili mmiri nke
mmegbu nke ikike mmadụ na Argentina, mgbe afọ iri ahụ gasịrị. N'ịgbaso mmegide Alfonsín siri ike na oge nke Agha Falklands na-echeghị echiche na 1982, ọ ghọrọ onye na-eduga n'ime UCR n'uhuruchi nke ntuli aka nke ọchịchị aka ike a na-ekwenyeghị na ya, na 1983. N'ịchọpụta nhọpụta na July, Alfonsín kwalitere Armendáriz dị ka onye UCR na-aga ime maka Gọvanọ nke Mpaghara Buenos Aires, ebe obibi nke 38% nke ndị Argentina.