O'Ballance describes the SDF on its formation as divided into five regions, with '..four "corps", all dissimilar: the Eastern Arab Corps, based at Kasala, comprising mostly of infantry companies, with a small mounted detachment; the Camel Corps in Kordofan, (another source refers to it as 'the Hajana') with a large element of camel-borne soldiers to patrol the vast desert expanses; the Western Arab Corps in Darfur consisting of a few mounted companies; and the Equatoria Corps (often referred to as the Southern Corps) in the three southern provinces, consisting of infantry companies - as, even leaving the tsetse fly out of account, camels and horses were of little value in the forest and swamp. Additionally, there was a detachment of cavalry at Shendi (other sources refer to the 'Shendi Horse') and of engineers at Omdurman, the total establishment being just under 5,000.'[4] Ibrahim Abboud commanded the Camel Corps after the Second World War. (OB 50)