 Triangulation of the signal placed its origin at Hill 63, a small granite outcrop seven kilometers east of LZ Ross.If the 3rd Regiment was indeed in the valley, Colonel Gelling's 198th Infantry Brigade had a rare opportunity to engage a major part of the 2nd Division.Gelling passed along the information to the executive officer of the 4th Battalion, 31st Infantry Regiment, Maj. Gilbert N. Dorland, who was on patrol near Ross with Companies B and D from his battalion, two platoons of armored personnel carriers from Troop F, 17th Cavalry and a platoon of tanks from Troop A, 1st Squadron, 1st Cavalry.