Battle of Nui Bop
1885 CE.
Shown on the map at 21.848°, 106.758°.
The Battle of Núi Bop (3–4 January 1885) was a French victory during the Sino-French War. The battle was fought to clear Chinese forces away from the French forward base at Chu, and was an essential preliminary to the Lạng Sơn Campaign in February 1885.
Text from the Wikipedia article Battle of Núi Bop, licensed CC BY-SA 4.0.