Between September and December 1943, RADEPA secretly conspired with the newly formed Revolutionary Nationalist Movement (MNR) to overthrow Peñaranda. The consequences of the Catavi massacre on 21 December 1942 which caused the deaths of 19 striking miners would ultimately bring down the government. Before the coup, opposition leaders requested that the president resign. Peñaranda, in turn, evaded a response and ordered the immediate change of military assignments for the RADEPA leaders, thus removing them from the center of conflict. In response, the date of the coup was brought forward.