 This firefight was distinguished by the first use of helicopters to reinforce and supply an American unit at night.On 6 November, two American companies engaged in a lengthy firefight with PAVN elements with the US claiming to have killed 77 at a cost of 26 American dead and 73 wounded.Between 9 and 11 November the 1st Brigade was withdrawn to its base at An Khe and replaced with the 3rd Brigade.