Battle of Las Piedras (1811)

Battle of Las Piedras
	Part of the Spanish American wars of independence
	; Surrender of Posadas at Las Piedras, by Juan Manuel Blanes
Date	May 18, 1811
Location	Near Las Piedras, Uruguay
Result	Revolutionary victory
Belligerents
Spain Royalist Army of Montevideo;	Criollos Orientales allies of the United Provinces of the Rio de la Plata
Commanders and leaders
José Posadas (POW)	José Gervasio Artigas; Manuel Francisco Artigas
Strength
Official Report: 668 600 cavalrymen 350 infantrymen 64 gunners with 4 pieces 2 4 inch cannons 2 64 mm mortars Acevedo's Estimation: ~1,004 ~500 infantrymen ~450 cavalrymen ~54 gunners with 4 pieces	Official Report: 1,076 600 cavalrymen (250 mounted regiment and 296 gauchos in two squadrons) 454 infantrymen (108 militia, 250 from the Patricios' Regiment and 96 Blandengues) 20 gunners 2 cannons Acevedo's Estimation: ~1,770 ~1300 cavalrymen ~430 infantrymen ~40 gunners with 4 pieces
Casualties and losses
638 97 killed 61 wounded 480 prisoners	negligible

The Battle of Las Piedras was fought on May 18, 1811 as part of the Uruguayan struggle for independence.