Siege of Zamboanga
1898 CE.
Shown on the map at 6.917°, 122.083°.
The siege of Fort Pilar was fought between April and May 1898 on then-town of Zamboanga in Mindanao as a part of the Philippine Revolution. One of the only few actions against Spanish colonials forces in Mindanao, the victory brought about by the Zamboangueño Ethnolinguistic Nation, after their capture of Fort Pilar several weeks later, paved way for the foundation of the short-lived Republic of Zamboanga.
Text from the Wikipedia article Siege of Fort Pilar, licensed CC BY-SA 4.0.