The event that led to the coup was the sweeping victory of Peronism in the elections held eleven days before and in which ten of the fourteen then-existent provinces, including the strategic Province of Buenos Aires where the textile union leader Andrés Framini won. Peronism had been banned by the government of the Revolución Libertadora but Frondizi had allowed it in the elections, although he continued to prohibit Juan Perón from returning to the country and from running as a candidate. Frondizi immediately moved to establish his power in the provinces in which Peronist parties had won, but the coup proved to be unstoppable.