Battle of Göllheim
1298 CE.
Shown on the map at 49.593°, 8.044°.
The Battle of Göllheim was fought on 2 July 1298 between the forces of duke Albert I of Habsburg (German: Albrecht) and king Adolf of Nassau following the unilateral decision of the prince electors, without any formal election, to dethrone Adolf and proclaim Albert as king. Adolf died in the battle.
Text from the Wikipedia article Battle of Göllheim, licensed CC BY-SA 4.0.