Siege of Chillán
1813 CE.
Shown on the map at -36.618°, -72.136°.
The siege of Chillán in Chile occurred from July 27th to August 10th, 1813, as patriot forces attempted to dislodge a determined band of royalist defenders. The failure of José Miguel Carrera to take the city would contribute to his removal from office by the junta later in the campaign.
Text from the Wikipedia article Siege of Chillán, licensed CC BY-SA 4.0.