The Antaifasy remained resistant to Merina domination and were never fully subjugated. In an effort to weaken them, the Merina provided support to the Zafisoro, a people who the Antaifasy had previously ruled. Despite French colonization in 1896 and the collapse of the Merina monarchy in 1897, animosity between the two groups has remained and occasionally flared up into violent conflict, as occurred in 1922, 1936 and 1990, resulting in dozens of deaths. During the Malagasy Uprising of 1947, the Malagasy leaders of the resistance movement against French rule (some of whom were aligned with Merina interests) took advantage of the unstable political context to act on old grudges by instigating the Zafisoro to attack the Antaifasy.In the run up to independence from France, two Antefasy brothers founded "l'Union Démocratique et Sociale" (1957), one of the most successful cross-island political parties. Their representatives took the top position in the Provincial Councils of Tuléar and Fianarantsoa. One of the party's founders, Norbert Zafimahova, was twice elected as president of the Territorial Assembly, delegated to represent Madagascar's interests in the French Senate in 1958. Since 1990, this has manifested in competition for control of disputed territory, the most significant being in Farafangana prefecture.