The Katangese Gendarmerie (French: Gendarmerie Katangaise), officially the Katangese Armed Forces (French: Forces Armées Katangaises), was the paramilitary force of the unrecognized State of Katanga in Central Africa from 1960 to 1963. The forces were formed upon the secession of Katanga from the Republic of the Congo with help from Belgian soldiers and former officers of the Force Publique. Belgian troops also provided much of the early training for the Gendarmerie, which was mainly composed of Katangese but largely led by Belgians and later European mercenaries.
Throughout the existence of the State of Katanga, the gendarmes sporadically fought various tribes and the Congolese National Army (ANC). In February 1961 the Gendarmerie initiated a series of operations aimed at suppressing anti-secessionist rebels of the Association Générale des Baluba du Katanga (BALUBAKAT) in northern Katanga. The campaign was largely successful, but the fighting led to atrocities and gendarmes were halted by forces of the United Nations Operation in the Congo (ONUC) during the Battle of Kabalo in April 1961. ONUC then initiated efforts to remove foreign mercenaries from the Gendarmerie, and launched Operation Rum Punch to arrest them in August 1961. They came into conflict with ONUC three times afterwards, in Operation Morthor (September 1961), Operation UNOKAT (December 1961), and Operation Grandslam (December 1962). Operation Grandslam marked the end of the Katangese secession in January 1963.