Battle of First Bar
1841 CE.
Shown on the map at 23.075°, 113.479°.
The Battle of First Bar was fought between British and Chinese forces at First Bar Island and its surrounding area in the Pearl River, Guangdong province, China, on 27 February 1841 during the First Opium War.
Text from the Wikipedia article Battle of First Bar, licensed CC BY-SA 4.0.