Les mornes — Haiti's mountains — were the geographic foundation of maroon resistance throughout the colonial period and shaped revolutionary warfare in 1791-1803. The major ranges include the Massif du Nord, Montagnes Noires, Chaîne des Matheux, Massif de la Selle (2,680 m), and Massif de la Hotte. Their dense terrain made them difficult for colonial forces to penetrate and gave fugitive communities in the Bahoruco, Grande-Anse, and Artibonite corridors the spatial autonomy to survive across generations.