The Sudan Defence Force (SDF) was a British Colonial Auxiliary Forces unit raised in the Anglo-Egyptian Sudan in 1925 to assist local police in internal security duties and maintain the condominium's territorial integrity. During World War II, it also served in East Africa as part of the East African campaign and in North Africa during the Western Desert campaign.

Gideon Force was a small British and African special force, a Corps d’Élite with the Sudan Defence Force, Ethiopian regular forces and Arbegnoch. Gideon Force fought the Italian occupation in Ethiopia, during the East African Campaign of the Second World War. The leader and creator of the force was Major Orde Wingate. At its peak, Gideon Force had fifty officers, twenty British NCOs, 800 trained Sudanese troops and 800 part-trained Ethiopian regulars, a few mortars but no artillery and no air support, except for intermittent bombing sorties.