Following the self-styled "Revolución Libertadora", a military coup which ousted Perón in 1955, Rucci progressively acquired fame by participating in the Peronist Resistance movement, and was jailed several times for breaching decree 4,161, which proscribed the very mention of Perón's name. Following the creation of the 62 Organizations, the political branch of the CGT, to which he ascribed, Rucci quickly progressed inside the unions' hierarchy, alongside fellow UOM leader Augusto Vandor.