Battle of Soissons (923)
The Battle of Soissons in 923 was a battle during which King Robert I of France was killed, possibly by King Charles III (by legend in single combat), and the latter was defeated and imprisoned by Rudolph, Duke of Burgundy who succeeded Robert I as French monarch.
Coordinates: 49°22′54″N 3°19′25″E / 49.38167°N 3.32361°E
...
Wikipedia