 Cam Lộ was intended to form a supporting base for the McNamara Line and provided artillery support USMC forces engaged at Con Thien.Route 561 which ran from Cam Lộ was the main supply route to Con Thien Cam Lộ formed one corner of what became known as Leatherneck Square, with the other corners being Con Thien, Firebase Gio Linh and Đông Hà Combat Base.In January 1968 Cam Lộ was occupied by artillery of the 2nd Battalion, 12th Marines with security provided by the 2nd Battalion, 9th Marines.