Portuguese conquest of French Guiana

Invasion of Cayenne
Part of the Napoleonic Wars

Carte de la Guyane françoise et l'isle de Cayenne, Jacques-Nicolas Bellin
Date6–14 January 1809
Location
Result

Anglo-Portuguese victory

  • Capitulation of Cayenne
  • Occupation of French Guiana by Portugal until 1817[1]
Belligerents
 United Kingdom  France
Commanders and leaders
Manuel de Elva
James Yeo
Victor Hugues Surrendered
Strength
3,250
1 frigate
2 brigs
1 schooner
2 cutters
1,250
Casualties and losses
33 killed and wounded 36 killed and wounded
400 captured

The Portuguese conquest of French Guiana, also known as Conquest of Cayenne (Portuguese: Conquista de Caiena), was a military operation against Cayenne, capital of the South American colony of French Guiana, launched in January 1809 in the context of the Napoleonic Wars. The invasion was undertaken by a combined expeditionary force that included Portuguese (from Portugal and from Colonial Brazil) and British military contingents.

The invasion was part of a series of attacks on French-held territory in the Americas during 1809, and due to commitments elsewhere, the British Royal Navy was unable to send substantial forces to attack the fortified river port. Instead, appeals were made to the Portuguese government, which had fled Portugal the year before during the Peninsular War and was resident in Brazil, its largest colony. In exchange for providing troops and transports for the operation, the Portuguese were promised Guiana as an expansion of their holdings in Brazil for the duration of the conflict.

The British contribution was small, consisting solely of the corvette HMS Confiance. Confiance however had a highly effective crew and an experienced captain in James Lucas Yeo, who was to command the entire expedition. The more substantial Portuguese contingent consisted of 700 regular soldiers of the colonial Army of Brazil, led by Lieutenant-colonel Manuel Marques de Elva Portugal, 550 marines of the Royal Brigade of the Navy detached in Brazil and several warships to act as transports and provide offshore artillery support.[2] The French defenders were weakened by years of Royal Navy blockade and could only muster 400 regular infantry and 800 unreliable militia, formed in part from the territory's free black population. As a result, resistance was inconsistent and despite Cayenne's strong fortifications, the territory fell within a week.

It is considered to be the baptism of fire of the Brazilian Marine Corps, as there was a participation of the Royal Brigade of the Navy that would give origin to it.[3]

  1. ^ Marley, p.785
  2. ^ FERREIRA, Fábio. A política externa joanina e a anexação de Caiena: 1809-1817. In: REVISTA TEMA LIVRE.
  3. ^ LEIVAS, Luís Cláudio Pereira; GOYCOCHÊA, Luís Felipe de Castilhos. A Conquista de Caiena. In: História Naval Brasileira. v.2. t..II.