During the French Revolutionary Wars, redoubts Number 4 and 5 were rebuilt with stone revetments and a sixth stone redoubt was built at Empacombe in 1807. A supporting barracks was built for the redoubts between 1804 and 1808.
Fortifications Number 4 and 5 were reconstructed during the French Revolutionary conflicts using stone defenses, and an additional stone fortification was erected at Empacombe in 1807. Between 1804 and 1808, a supporting military base was constructed to support these fortifications.