The Battle of Fontenoy was the decisive engagement of the Carolingian Civil War, directly shaping the territorial division of the Carolingian Empire.
Key Facts
- Date of Battle
- 25 June 841
- Location
- Fontenoy, near Auxerre
- Conflict
- Carolingian Civil War (838–843)
- Outcome resolved by
- Treaty of Verdun, 843
- War duration after battle
- Approximately 2 more years
By the Numbers
Location
Cause → Event → Consequence
Following the death of Louis the Pious, his sons disputed the territorial inheritance of the Carolingian Empire. Despite Louis' provisions for succession, competing claims among his sons and nephews—Lothair I, Pepin II, Charles the Bald, and Louis the German—led to open armed conflict lasting three years.
On 25 June 841, the allied forces of Lothair I of Italy and Pepin II of Aquitaine met those of Charles the Bald and Louis the German at Fontenoy near Auxerre. The battle was large but poorly documented due to subsequent destruction of records. It ended in a decisive defeat for Lothair and Pepin, and a victory for Charles and Louis.
Although hostilities continued for roughly two more years after the battle, the defeat of Lothair and Pepin at Fontenoy set the stage for the Treaty of Verdun in 843, which formally partitioned the Carolingian Empire among the three surviving sons of Louis the Pious and had lasting influence on the political geography of medieval Europe.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Charles the Bald, Louis the German.
Side B
1 belligerent
Lothair I, Pepin II of Aquitaine.