Italian reinforcements arrived in October and patrolled more frequently, just as dissensions among local potentates were reconciled by Sandford's diplomacy. The Frontier Battalion of the Sudan Defence Force, set up in May 1940, was joined at Khartoum by the 2nd Ethiopian and 4th Eritrean battalions, which were raised from émigré volunteers in Kenya. Operational Centres consisting of an officer, five NCOs and several picked Ethiopians were formed and trained in guerrilla warfare to provide leadership cadres and £1 million was set aside to finance operations. Major Orde Wingate was sent to Khartoum with an assistant to join the headquarters of the SDF. On 20 November, Wingate was flown to Sakhala to meet Sandford, and the RAF managed to bomb Dangila, drop propaganda leaflets and supply Mission 101, which raised Ethiopian morale, which had suffered suffered much from Italian air power since the Second Italo-Abyssinian War. Mission 101 managed to persuade the "Arbegnoch" north of Lake Tana to spring several ambushes on the Metemma–Gondar road, and the Italian garrison at Wolkait was withdrawn in February 1941.