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The Invasion of Île de France was a complicated but successful amphibious operation in the Indian Oceanmarker, launched in November 1810 during the Napoleonic Wars. During the operation, a substantial British military force was landed by the Royal Navy at Grand Baiemarker on Île de Francemarker. Marching inland against weak French opposition, the British force was able to overwhelm the defenders in a series of minor engagements, culminating in the capture of the island's capital Port Napoleonmarker and the surrender of Charles Decaen, the French governor. The surrender eliminated the last French territory in the Indian Oceanmarker and among the military equipment captured were five French Navy frigates and 209 heavy cannon. Île de France was retained by Britain at the end of the war under the name of Mauritiusmarker and remained part of the British Empire until 1968.

The operation was the culmination of two years of conflict over the island and the neighbouring Île Bourbonmarker between frigate squadrons commanded by Josias Rowley and Jacques Hamelin. Hamelin repeatedly raided British trade convoys and Rowley responded with amphibious assaults on French harbours, but neither had gained ascendancy by the time Rowley sent most of his force to attack the port of Grand Portmarker on Île de France in August 1810. At the ensuing battlemarker the British squadron was destroyed and Hamelin began to blockade Rowley on Île Bourbon. As British reinforcements were urgently despatched, several actions were fought between recently arrived British ships and the more numerous French forces. At the last of these on 18 September 1810, Hamelin was defeated and captured by Rowley. This allowed Rowley to build his forces over the next two months until they were sufficient for a successful invasion, which was led by the recently arrived Admiral Albemarle Bertie.

Background

The Indian Oceanmarker had been an important strategic region for British trade since the first British trading posts were developed in Indiamarker. By the Napoleonic Wars, millions of pounds worth of goods crossed the ocean's trade routes every year, mostly in the heavily guarded convoys of East Indiamen. The French recognised the economic importance of these convoys but until 1808 failed to provide sufficient forces to disrupt the Indian trade. Late in 1808, it was decided to send a strong frigate squadron to the Ocean under the command of Jacques Hamelin to augment the forces available on the island bases of Île Bonapartemarker and Île de Francemarker and raid British shipping in the region. Hamelin was an able commander and between May 1809 and July 1810 his ships captured seven East Indiamen and a large number of small merchant ships and warships.

The British response to Hamelin's deployment was provided by Admiral Albemarle Bertie, who collected a squadron of ships from those available at the Cape of Good Hopemarker and placed them under the command of Commodore Josias Rowley. Bertie gave Rowley instructions to blockade the islands and prepare for invasion attempts once the required forces could be spared. During 1809 and the spring of 1810, Rowley maintained the blockade and launched a series of small raids, the largest being at Saint Paulmarker on Île Bonaparte in September 1809. By July 1810, Rowley had developed sufficient forces at his island base on Rodriguezmarker to successfully invade and capture Île Bonaparte, which he restored to its former name of Île Bourbon. In August, Rowley attempted to extend his blockade of Île de France by seizing small islands off the main ports that could control the passage of shipping through the coral reefs that surround the island. The first operation was to capture Île de la Passemarker off Grand Portmarker, which was successfully secured on 13 August. Shortly afterwards a French squadron forced passage into the harbour and Captain Samuel Pym ordered the four frigates of the blockade squadron to attack the ships anchored in the bay. The ensuing Battle of Grand Portmarker was a disaster for the British, as two frigates were wrecked on the reefs and two others captured with their entire crews: only the very seriously wounded, including Captain Nesbit Willoughby, were repatriated to Île Bourbon.

With his squadron reduced to a single frigate, Rowley sent urgent messages to the British bases at Madrasmarker and Cape Townmarker requesting reinforcements. The naval authorities responded by sending the forces they had available to join Rowley at Rodriguez. The first two frigates to arrive, HMS Africaine and HMS Ceylon were both attacked while sailing alone and captured by Hamelin's squadron, which was now blockading Île Bourbon. Rowley was able to recapture both ships within hours of their loss, and was also able to seize Hamelin and his flagship Vénus at the Action of 18 September 1810. The loss of the French naval commander was a serious blow to the squadron on Île de France, which was also beset by supply problems resulting from a lack of naval stores and food supplies. Unable to make the lengthy cruises needed to disrupt the Indian Ocean trade routes, they were forced to remain in harbour as Rowley was heavily reinforced during September and October 1810.

Planning

The invasion of Île de France, although prompted by the defeat at Grand Port, had been the ultimate intention of Rowley's squadron since its creation in 1809 and had been planned carefully both on a strategic level by Bertie at Cape Townmarker and Lord Minto at Madras and on a tactical level by Rowley and his British Army counterpart Lieutenant-Colonel Henry Keating on Rodriguez. The transport ships and soldiers would come from the Indian garrisons at Madrasmarker, Bombaymarker and Calcuttamarker, to be led by General John Abercromby (although they were also accompanied by Rear-Admiral William O'Bryen Drury, whom Bertie ordered to return to Madras before the invasion) while the naval forces to protect and support the invasion force were to be provided by Bertie from the Cape of Good Hope. These forces were to gather at Rodriguez in preparation for the invasion. The landings themselves were planned by Rowley and Keating, who relied on Willoughby's intimate knowledge of the coastline of Île de France and a series of careful surveys of the reefs that surrounded the island to select a landing site.

The chosen point was at Grand Baiemarker, on the northwestern coastline approximately north of the island's capital Port Napoleonmarker. The intention was to prepare an elite force of 1,555 men formed from the Grenadier and light companies of the regiments attached to the invasion. This vanguard would storm ashore and advance rapidly towards the capital closely supported by a naval brigade of sailors and Royal Marines and followed by the main body of the army, numbering 5,293 soldiers. The entire force would have logistical assistance and artillery support from Royal Navy ships that would shadow the advance along the coast. The army's orders were to seize Port Napoleon and capture Governor Charles Decaen, which action, it was hoped, would be sufficient to force the surrender of the entire island. Subsequent landings would be made to the west of the capital if French resistance was stronger than expected.

On 15 October, Bertie arrived at Rodriguez with his squadron from Cape Town. On 3 November troops from the Bombaymarker garrison arrived, followed on 6 November by the Madras contingent. On Rodriguez the invasion plans were finalised, HMS Staunch sent to reconnoitre the northern coastline of Île de France to seek a suitable beach. Command of the landing and the naval support role was given to Captain Philip Beaver, who had a reputation as an expert in amphibious operations. Keating was placed in command of the vanguard of the land force, with Captain William Augustus Montagu commanding of the naval brigade and Abercromby in overall charge. Rowley would remain offshore in HMS Boadicea as would Bertie, who took Africaine as his flagship.

The French response to the impending British invasion was to mobilise the island's 10,000 strong militia. Despite their large numbers, this force was untrained, poorly armed and poorly motivated. Decaen himself recognised that they would be unreliable in the face of attack by British regular soldiers. He also bolstered his forces by attempting to recruit volunteers from among the hundreds of prisoners of war held in the island's prisons (a principal cause of the food shortages on Île de France). Over 500 volunteers agreed to join his army, the majority of them Irishmen promised French assistance in obtaining Irish independence from Britain. Altogether, Decaen could muster 1,300 regular soldiers to defend the capital, which he placed under the command of General Edmé-Martin Vandermaesen.

Invasion

On 22 November 1810, all the British troops and ships were assembled and Bertie ordered the squadron to rendezvous off Grand Baie, which was reached early on 29 November despite adverse winds. The vanguard landed unopposed, their landing craft supported by ship's boats carrying cannon, supplemented by the firepower of the larger ships offshore. Although there was some disruption in the early stages of the attack caused by adverse weather conditions, by 21:00 the entire vanguard and naval brigades were ashore. The landing had been effected with just two casualties, both men who died of natural causes. Keating took command of the vanguard and advanced on Fort Malartic, the garrison retreating before his troops and blowing up the fort as they left. During the morning of 30 November, Keating pushed southwards to the River Tombeaumarker which overlooked Port Napoleon, his front units skirmishing with French defenders across the river, during which Decaen himself was lightly wounded by a musket ball. The bridge over the river had been held by a force of militia, but they fell back before the British advance and failed to properly demolish the bridge, allowing Keating to rapidly cross and threaten Port Napoleon. At Grand Baie, the remainder of the invasion force were coming ashore, so that the entire army had landed by midday, although Abercromby himself elected to stay with Beaver on HMS Nisus and follow the advance from offshore.

On 1 December, Vandermaesen made a stand before Port Napoleon, defending the entrance to the town with his available regular troops and some small cannon. Keating attacked him, engaging the French front while a second attack by Madras sepoys outflanked the French line and disrupted it, allowing a successful frontal assault. With their defences breached the French fell back and on 2 December Decaen proposed a ceasefire, which was accepted. The following day Decaen surrendered, although with guarantees that he and the garrison would be repatriated and allowed to retain their personal arms and Eagles. Although some in the British force were unhappy with the terms of the surrender, the British commanders were relieved to have the invasion complete before the hurricane season began later in the month. The danger to the 70 ships in the British fleet from such a storm was serious and it was vitally important that they were in a safe harbour when the hurricane season began.

Aftermath

The surrender of Île de France marked the final British operation of the campaign and the capture of the last French territory east of Africa. The island was restored to its pre-1715 name of Mauritiusmarker and the towns renamed under Decaen (such as Port Napoleon) were restored to their pre-Revolutionary names. Governor Robert Townsend Farquhar of Île Bourbon was placed in administrative control of the island, Île Bourbon taken over by Keating. Although the French garrison was repatriated, the invaders captured six French frigates and several smaller warships in the various harbours of Île de France as well as 24 merchant ships. Also seized were the East Indiamen Ceylon, Charlton and United Kingdom and 209 heavy cannon. Among the hundreds of prisoners released were the survivors of the Battle of Grand Port and the crews and passengers from the Indiamen captured over the previous year. Among the French prisoners, were discovered 12 deserters from the British Army or Royal Navy (at least 40 successfully passed as Frenchmen and were repatriated to France). These 12 were put on trial on their return to Britain: two were later hanged and five transported. Rewards were forthcoming, particularly for Bertie, who was made a baronet. This created a scandal when Admiral Drury accused Bertie of taking credit for the work of others (principally Drury himself). Mauritius, unlike Île Bourbon, remained in British hands after the end of the war in 1814 and was retained as part of the British Empire until granted independence in 1968.

Although there were no further British operations in the region, the Mauritius campaign was not quite over. When news of the victory at Grand Port had reached France, there was pressure to resupply and reinforce the victorious squadron under Hamelin and a small squadron commanded by Commodore François Roquebert was ordered to sail for Île de France. This squadron included three frigates: Renommée, Clorinde and Néréide and carried extensive stores to repair and rearm Hamelin's frigates. The journey from France to the Indian Ocean was a long one, and it was not until February 1811 that Roquebert's squadron arrived at Mauritius. Discovering that the island was in British hands, Roquebert attempted to return to France but was chased by the frigates stationed on Mauritius and captured at the Action of 20 May 1811, only one of his ships escaping the British pursuit.

Orders of battle

Admiral Bertie's squadron
Ship Rate Guns Navy Commander Notes
HMS Illustrious Third rate 74 Captain William Robert Broughton
HMS Cornwallis Fifth rate 44 Captain James Caulfield
HMS Africaine Fifth rate 38 Vice-Admiral Albemarle Bertie

Captain Charles Gordon
HMS Boadicea Fifth rate 38 Captain Josias Rowley
HMS Nisus Fifth rate 38 Captain Philip Beaver
HMS Clorinde Fifth rate 38 Captain Thomas Briggs
HMS Menelaus Fifth rate 38 Captain Peter Parker
HMS Nereide Fifth rate 38 Captain Robert Henderson
HMS Phoebe Fifth rate 36 Captain James Hillyar
HMS Doris Fifth rate 36 Captain William Jones Lye
HMS Cornelia Fifth rate 32 Captain Henry Folkes Edgell
HMS Psyche Fifth rate 32 Captain John Edgcumbe
HMS Ceylon Fifth rate 32 Commander James Tompkinson
HMS Hesper Brig 18 Commander David Paterson
HMS Eclipse Brig 18 Lieutenant Henry Lynne
HMS Hecate Brig 18 Lieutenant George Lucas Rennie
HMS Acteon Brig 16 Lieutenant Ralph, Viscount Neville
HMS Staunch Brig 14 Lieutenant Benjamin Street
HMS Emma Armed ship Lieutenant Robert Forder
Egremont Hired ship
Farquhar Hired ship
Mouche Armed ship
In addition to the above warships, the invasion fleet included approximately 50 small transport ships initially under the command of Rear-Admiral William O'Bryen Drury, who was sent back to Madras before the invasion. The British Army troops attached to the force included sepoys and garrison artillery from Madrasmarker and soldiers from the 12th Foot, 33rd Foot, 56th Foot and 59th Foot commanded by General John Abercromby and Lieutenant Colonel Henry Keating. Also attached was a naval brigade of volunteer sailors and Royal Marines under Captain William Augustus Montagu.
Sources:James Vol. 5, p. 325, Clowes, p. 294, Woodman, p. 291–292


French squadron
Ship Rate Guns Navy Commander Notes
Bellone Fifth rate 40 Captured. Commissioned into the Royal Navy as HMS Junon
Astrée Fifth rate 40 Captain Pierre Bouvet Captured. Commissioned into the Royal Navy as HMS Pomone
Minerve Fifth rate 48 Captured. Broken up as unfit for service.
Manche Fifth rate 40 Captured. Broken up as unfit for service.
Iphigénie Fifth rate 36 Captured. Returned to service as HMS Iphigenia.
Néréide Fifth rate 36 Captured. Broken up as unfit for service.
Victor Brig 18 Captured. Broken up as unfit for service.
Entreprenant Brig 18 Captured. Broken up as unfit for service.
Note: At the time of the invasion, only two of the above ships were serviceable and as a result many ships were commanded by temporary officers or none at all. Records on which French officers commanded which ships are incomplete, and so only those that are known are inserted in the above table. In addition to the warships, none of which participated in the campaign, Governor Charles Decaen could muster 1,300 French Army troops including 500 volunteers from among the British prisoners of war and 10,000 unreliable local militia.
Sources: James Vol. 5, p. 325, Clowes, p. 294, 560


Notes

  1. Gardiner, p. 92
  2. Gardiner, p. 93
  3. James, Vol. 5, p. 192–195
  4. James, Vol. 5, p. 272
  5. James, Vol. 5, p. 295
  6. Woodman, p. 293
  7. James, Vol. 5, p. 324
  8. Gardiner, p. 96
  9. Taylor, p. 325
  10. James, Vol. 5, p. 324
  11. James, Vol. 5, p. 325
  12. Taylor, p. 328
  13. Woodman, p. 292
  14. Macmillan, p. 39
  15. Clowes, p. 295
  16. Clowes, p. 294
  17. Taylor, p. 330
  18. James, Vol. 5, p. 326
  19. Woodman, p. 293
  20. Gardiner, p. 97
  21. Macmillan, p. 40
  22. Woodman, p. 284
  23. Taylor, p. 331
  24. Bertie, Sir Albemarle, Oxford Dictionary of National Biography, Stephen Howarth, (subscription required), Retrieved 20 December 2008
  25. Clowes, p. 486
  26. James, Vol. 6, p. 15


References




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