 The 11th Hussars found a gap at Chaulan, south of Wadi Derna, which threatened the Babini Group and the defenders in Derna with encirclement and Bergonzoli ordered a retreat.The Italians disengaged on the night of before the garrison could be trapped; Babini Group rearguards cratered roads, planted mines, set booby-traps and managed to conduct several skilful ambushes, which slowed the British pursuit.The Italians in Libya were dependent supplies from Italy, which were moved by road and short stretches of railway.