Battle of Kanzan
1915 CE.
Shown on the map at 25.567°, 49.700°.
The Battle of Kanzan was a territorial battle between the Al Saud and their long-term enemies, the Ajman tribe, which began in June 1915 and lasted for nearly six months. The reason for the battle was the tribe resisting the Al Saud rule.
Text from the Wikipedia article Battle of Kanzan, licensed CC BY-SA 4.0.