The CGTA gathered many unionist delegates who refused to participate to the Normalisation Congress, opposing collaboration with the junta.
It was headed in Cordoba by the leader of the Cordobese trade union Luz y Fuerza [es], Agustín Tosco.
They took an important part in the Cordobazo uprising and the call for a general strike, which occurred on 30 June 1969, hours following Augusto Vandor's assassination.
Thereafter, most of its leaders, including Raimundo Ongaro, Agustín Tosco, Elpidio Torres [es], Lorenzo Pepe, etc., were jailed.
Following the failure of a 120 days strike at the Fabril Financiera, and the reconciliation between Augusto Vandor, leader of the "participationists", with Juan Perón, the CGTA witnessed many of its unions joining the 62 Organisations [es], the Peronist political front of the CGT.