Battle of the Grebbeberg
1940 CE.
Shown on the map at 51.954°, 5.600°.
The Battle of the Grebbeberg (Dutch: Slag om de Grebbeberg) was a major engagement during the Battle of the Netherlands, which was a part of the World War II Operation Fall Gelb in 1940.
Text from the Wikipedia article Battle of the Grebbeberg, licensed CC BY-SA 4.0.