In Sudan, the Royal Air Force (RAF) Air Headquarters Sudan (Headquarters 203 Group from 17 August, Air Headquarters East Africa from 19 October), subordinate to the AOC-in-C Middle East, had 14 Squadron, 47 Squadron and 223 Squadron (Wellesley bombers). A flight of Vickers Vincent biplanes from 47 Squadron performed Army Co-operation duties and were later reinforced from Egypt by 45 squadron (Bristol Blenheims). Six Gladiator biplane fighters were based in Port Sudan for trade protection and anti-submarine patrols over the Red Sea, the air defence of Port Sudan, Atbara and Khartoum and army support.