The Battle of Derapet was fought near the village of Derapet in the Tangi Valley in Deh Rahwod, Orūzgān Province, southern Afghanistan, between a combined Australian Army and Afghan National Army patrol and Taliban forces on 24 August 2010. Australian forces had only recently taken over responsibility for Deh Rahwod as part of a major expansion of their area of operations which took place following the Dutch withdrawal from Afghanistan in August. The combined coalition patrol included 20 Australians and 20 Afghan National Army troops. The small Australian force from 1st Mentoring Task Force (MTF-1) based in Tarin Kowt included two sections of dismounted infantry and two ASLAV-25 guncars and was tasked with a fighting patrol to find and inflict damage on insurgent forces known to be in the