 During an 8-day patrol into the DMZ, they encountered minimal opposition from the PAVN rearguard.Searches of numerous bunkers and other complexes indicated that the PAVN had only recently abandoned the positions.On 11 October a brigade mechanized infantry and tank force, composed of Companies B and C, 61st Infantry and Company B, 77th Armored, engaged a platoon of PAVN in heavily fortified bunkers, 2.5 km northeast of Con Thien.