Shorncliffe Redoubt: A Napoleonic Earthwork Fortification in Kent
Site at a Glance
- Rating
- 4.9
- Popularity
- Very Low
- Country
- United Kingdom
- Primary era
- Early Modern
- Eras represented
- Early Modern, Modern
- Civilizations
- British
- Site type
- Military
- Remains
- Fort
On this page6 sections
History
Shorncliffe Redoubt is a British earthwork fortification in Sandgate, United Kingdom, built during the Napoleonic period to protect the Kent coast from a threatened French invasion. A redoubt is a detached defensive fortification, and this example stood approximately 20 miles from the French coast. Its construction reflected concern that Britain’s land defenses were inadequate despite the country’s heavy reliance on the Royal Navy.
Napoleonic defenses
In 1794, the British Parliament purchased a large tract of land at Shorncliffe for initial fortifications. Colonel William Twiss, a British military engineer, designed the redoubt. It formed part of a wider defensive network along the Kent coast, including the Royal Military Canal, a waterway intended to hinder an invading force and support defenses in Kent and Sussex. Work on the canal began in October 1804 and ended in June 1805. Martello towers, small coastal forts designed for artillery defense, were built in the region between 1805 and 1808.
The redoubt also became associated with the training of British light infantry. It later accommodated the 43rd (Monmouthshire) Regiment of Foot, the 52nd (Oxfordshire) Light Infantry, and the 95th Rifles. In 1802, Sir John Moore trained light infantry brigades at Shorncliffe. Moore was a British Army general associated with the development of light infantry tactics, while Colonel Coote Manningham was involved in their development and training.
Changing military use
Shorncliffe Redoubt was repeatedly reshaped as military functions and tactics changed. Some historical maps show heavily fortified magazines, buildings or storage spaces for ammunition and other supplies, as part of a proposed much larger star fort. A star fort used projecting angular bastions to let defenders cover its walls with overlapping fire. That larger fort was never built, however, because changes in infantry tactics associated with Coote Manningham and Sir John Moore altered the defensive requirements.
Shorncliffe Army Camp remains nearby and continues to be used, while the redoubt itself has fallen into disrepair. An archaeological excavation investigated the fortification but did not locate the magazines shown on some maps. Those plans instead appear to have represented the intended layout of the unbuilt larger star fort.
Remains
The redoubt occupies an approximately 300-by-300-foot site at Sandgate. Its principal surviving form is an earthwork fort, built from compacted soil, turf, and stony material rather than masonry. The earthwork outer walls have remained the most consistent part of the site despite later alterations and redesigns. Defensive ditches approximately 5 metres deep surrounded the redoubt, while the raised earthen ramparts beyond them strengthened its defenses.
Ramparts and construction
The ramparts were made in layers. Turf and topsoil were first removed, and the stony substrate was used to form the core of the walls. Successive layers of topsoil and stony material were then compacted over it. Turf was probably placed at the bottom of the mound to improve stability and encourage grass growth, helping protect the earthwork from weathering.
Later alterations and proposed magazines
During the Victorian period, the seaward wall was lowered so that the Commandant and his wife could look out to sea. The historical maps showing magazines relate to the proposed larger fort rather than to structures located by excavation. The redoubt remains in a state of disrepair, with its earthwork defenses continuing to define the surviving site.
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