Brian Schneider's renovation work at Llanerch CC in Philadelphia resembles fortification, with greenside and fairway hazards being very intentional abrupt landforms, cops, mounds, pits, etc. 9 holes were done last fall with the other 9 slated to be done this fall.
Gil's work at Savannah GC in Georgia looked to be planning a bit of a reroute to either incorporate some civil war mounding or at least bring you closer to it. Remember seeing his instagram awhile back with a photo of the civil war era stuff, not sure where that project stands however.
Vicksburg CC in Mississippi is an old Stiles course that's quite close to the Vicksburg National Military Park. An interstate separates the two now, but there could still be some some fortification stuff scattered throughout the course