News of the Italian disaster in Egypt, the harassment by Gazelle Force and the activities of Mission 101 in Ethiopia, led to the Italians withdrawing their northern flank to Keru and Wachai and then on 18 January to retreat hurriedly from Kassala and Tessenei, the triangle of Keru, Biscia and Aicota. Wavell had ordered Platt to advance the offensive from March to 9 February and then to 19 January, when it seemed that Italian morale was crumbling. The withdrawal led Wavell to order a pursuit and the troops arriving at Port Sudan (Briggs Force) to attack at Karora and advance parallel to the coast, to meet the forces coming from the west.