 The Leagues activities involved general recruitment, the running of classes in Marxism, the selling of, first, "The Workers' Press" and, later, "News Line"- both published in England - and attempting interventions in industrial disputes'.In the mid-seventies, the League ran a Right to Work Campaign which involved a number of demonstrations in Dublin, one of which culminated in a 'mass' meeting in the Mansion House.Jack O'Connor, who would later become General President of SIPTU in 2003, and President of ICTU in 2009, was an activist and organiser with the League for much of the 1970s.