British invasions of the River Plate

British invasions of the River Plate
	Part of Anglo-Spanish War (1796–1808)
	; William Beresford surrenders to Santiago de Liniers (1806)
Date	1806–1807
Location	Río de la Plata, Viceroyalty of the Río de la Plata, Kingdom of Spain; (present-day Argentina and Uruguay)
Result	Spanish victory
Belligerents
Spain Viceroyalty of the Río de la Plata; ;	United Kingdom
Commanders and leaders
Rafael de Sobremonte; Santiago de Liniers; Pascual Ruiz Huidobro; Martín de Álzaga; Juan Martín de Pueyrredón	Home Riggs Popham; William Beresford ; John Whitelocke; Samuel Auchmuty; Charles Stirling; George Murray
Strength
First invasion: ~2,500 soldiers; ; Second invasion: ~2,000 soldiers in Montevideo; ~7,000–8,000 soldiers in Buenos Aires; ;	First invasion: ~1,668 soldiers; ; Second invasion: ~6,000 soldiers in Montevideo; ~9,000–12,000 in Buenos Aires; ;
Casualties and losses
First invasion:; 205 dead and wounded; ; Second invasion; 1,500 casualties in Montevideo; ; 600 killed and wounded in Buenos Aires; ;	First invasion:; 157 dead and wounded, 1,300 captured; ; Second invasion; 600 casualties in Montevideo; ; 311 killed, 208 missing, 679 wounded, 1,600 captured in Buenos Aires; ;

The British invasions of the River Plate were two unsuccessful British attempts to seize control of the Spanish colony of the Viceroyalty of the Río de la Plata, located around the Río de la Plata in South America – in present-day Argentina and Uruguay. The invasions took place between 1806 and 1807, as part of the Napoleonic Wars, War of the Third Coalition at a time when Spain was an ally of Napoleonic France. In Argentine historiography, the two successive defeats of the British expeditionary forces are known collectively as the Reconquista and the Defensa, respectively.