When one first walks through what one considers to be the main gate of Fort Ligonier, one is not actually yet in Fort Ligonier. One has merely entered the Retrenchment, a double-tiered wall of horizontal logs, topped with fraising, sharpened pickets set at a 30° angle.

An enemy that might have made it past the retrenchment would be confronted with this arresting sight: Our first view of the Fascine Artillery Battery.