The 1st South African Infantry Division was an infantry division of the army of the Union of South Africa. During World War II the division served in East Africa from 1940 to 1941 and in the Western Desert Campaign from 1941 to 1942. The division was disbanded on 1 January 1943, for conversion into what would become the 6th South African Armoured Division. The division was also briefly active after the war from 1 July 1948 to 1 November 1949.