During which decades was the terrorist group , which launched Operation Primicia, active?
Operation Primicia:  It was the largest attack ever launched by the paramilitary group Montoneros, which attempted to seize the barracks of the 29th Forest infantry regiment. Montoneros: Montoneros (Spanish: "Movimiento Peronista Montonero-MPM" ) was an Argentine leftist terrorist and urban guerrilla group, active during the 1960s and 1970s.
1960s and 1970s