Johnson South Reef skirmish
1988 CE.
Shown on the map at 9.717°, 114.283°.
The Johnson South Reef skirmish took place on 14 March 1988 between military forces of China and Vietnam, on the Johnson South Reef in the Union Banks region of the Spratly Islands, in the South China Sea.
Text from the Wikipedia article Johnson South Reef skirmish, licensed CC BY-SA 4.0.