The Battle of la Tablada de Tolomosa was fought on 15 April 1817 near the town of Tarija in today's southern Bolivia between the royalist forces under colonel Mateo Ramírez and republican local forces under Eustaquio Méndez allied with the Army of the North under Gregorio Aráoz de Lamadrid. The main caudillos directing the militias were Méndez, José María Avilés and Colonel Francisco Pérez de Uriondo, one of the Tarijan's commanders allied with General Güemes' guerrillas. The town's center was under Ramírez and well defended by royalist troops.