 A Company , 2nd Engineer Combat Battalion , moved to the south side of the Yongsan @-@ Naktong River road ; D Company of the 2nd Engineer Battalion was on the north side of the road . Approximately 2 miles ( 3 @.@ 2 km ) west of Yongsan an estimated 300 North Korean troops engaged A Company in a fire fight . M19 Gun Motor Carriages of the 82nd AAA Battalion supported the engineers in this action , which lasted several hours . Meanwhile , with the approval of General Bradley , D Company moved to the hill immediately south of and overlooking Yongsan . A platoon of infantry went into position behind it . A Company was now ordered to fall back to the southeast edge of Yongsan on the left flank of D Company . There , A Company went into position along the road ; on its left was C Company of the Engineer battalion , and beyond C Company was the 2nd Division Reconnaissance Company . The hill occupied by D Company was in reality the western tip of a large mountain mass that lay southeast of the town . The road to Miryang came south out of Yongsan , bent around the western tip of this mountain , and then ran eastward along its southern base . In its position , D Company not only commanded the town but also its exit , the road to Miryang . 
