Leopold's "Force Publique," a private army that terrorized natives to work as forced labour for resource extraction, disrupted local societies and killed and abused natives indiscriminately. The "Force Publique" also became involved in the 1892–1894 Congo–Arab War against African and Arab slavers like Zanzibari/Swahili strongman Hamad bin Muhammad bin Juma bin Rajab el Murjebi (Tippu Tip).