From 1911 to 1915, there were six presidents, each of whom was killed or forced into exile.[1] The revolutionary armies were formed by cacos, peasant brigands from the mountains of the north, along the porous Dominican border, who were enlisted by rival political factions with promises of money to be paid after a successful revolution and an opportunity to plunder. The United States was particularly apprehensive about the role of the German community in Haiti (approximately 200 in 1910), who wielded a disproportionate amount of economic power. Germans controlled about 80% of the country's international commerce; they also owned and operated utilities in Cap Haïtien and Port-au-Prince, the main wharf and a tramway in the capital, and a railroad serving the Plaine de Cul-du-Sac.