Complex sentence: The last air combat took place on 29 October and the Italian forces surrendered on 27 November 1940 after which a reduced SAAF presence was maintained in East Africa for coastal patrol purposes until May 1943.
Split into simpler sentences: The last air combat took place on 29 October, and the Italian forces surrendered on 27 November 1940. A reduced SAAF presence was maintained in East Africa for coastal patrol purposes until May 1943.