Establishing French control was difficult. Belgian King Leopold II also tried to gain a foothold on the northern bank of the Congo River and sent Stanley to the area around Brazzaville. Following this was a series of revolts against the French of which the Bahangala Revolt led by Mabiala Ma Nganga was the first important one. It started in 1892 with the murder of the French administrator Laval and ended with the killing by the French of its leader in 1896. Many of the revolts were the result of French policy of maltreating the local population through the use of harsh forced labor. The locals were governed through the use of the repressive Code de l'indigénat Act. A law, which introduced forced labor, made it illegal for the local population to publicly air its grievances and excluded them from all the important jobs.