In 1963, the Quebec wing of the Social Credit Party of Canada split off from the national party as the Ralliement des créditistes. The split had its roots in a long-standing dispute between the de facto leader of the Ralliement, Réal Caouette, and the party's national leader, Robert N. Thompson. At the party's 1960 leadership convention, held two years after the party lost all of its seats in the House of Commons of Canada, Thompson defeated Caouette for the leadership. The party returned to Parliament in the 1962 federal election, but all but four of its 30 MPs came from Quebec. Under the circumstances, Thompson was all but forced to name Caouette as deputy leader of the party. The relationship was strained, however, and the strain was exacerbated when the party failed to make any gains in its old heartland of the Prairies in the 1963 federal election. Only Thompson and three others were elected outside of Quebec, while 20 Socreds were elected in Quebec. The two factions of the party were not re-united until October 1971.