Siege of Laon
741 CE.
Shown on the map at 49.563°, 3.624°.
The siege of Laon was a Frankish siege of the rebel Grifo's fortified city of Laon in 741. The Frankish army under the Mayors of the Palace, the brothers Carloman and Pepin the Short, besieged the fortress and took Grifo, the Mayors' half-brother, captive.
Text from the Wikipedia article Siege of Laon (741), licensed CC BY-SA 4.0.