Operation Military_operation Red Wings , informally referred to as the Battle of Abbas Ghar ( often incorrectly called Name_conferral `` Operation Redwing '' or `` Operation Red Wing '' ) , was a combined / joint Collaboration military operation during the War in Afghanistan in the Pech District of Afghanistan 's Kunar Province , on the slopes of a mountain named Name_conferral Sawtalo Sar , approximately west of Kunar 's provincial capital of Asadabad , in late June through mid-July 2005 .