For much of late 1969 and 1970, FSB Nancy, located in northern Long Khanh Province next to the village of Dinh Quan, served as the headquarters for the "Warrior" battalion and Charlie Battery of the 2-40th Artillery.
The geography surrounding the firebase was well-known throughout the country because of the large granite rock formations that were found there. The base was also in an active and hot AO with frequent contacts between the Redcatchers and the NVA/VC forces in the rolling hills and triple canopy jungle of the region.
Here are 2 spotter planes used for the firebase, but i'll be damned if I can remember the type of planes they were. The one looks like a twin for an AH Storch.