 However, the US Army's 5th Special Forces Group held an advanced course in the art of patrolling for potential Army and Marine team leaders at their Recondo School in Nha Trang, Vietnam, for the purpose of locating enemy guerrilla and main force North Vietnamese Army units, as well as artillery spotting, intelligence gathering, forward air control, and bomb damage assessment.During the War on Terror, the US Army began to develop a limited number of special reconnaissance platoons at the battalion level of conventional infantry units.These platoons were most often composed of Ranger-qualified soldiers and given selection of advanced training in order to allow them to work in close conjunction with Special Forces and US Government Agencies.