Polish victory over Pomeranian forces secured Nakło and preceded the broader 1109 Polish defense against the Holy Roman Empire.
Key Facts
- Date of battle
- 10 August 1109
- Polish commander
- Duke Bolesław III Wrymouth
- Opposing force
- Pomeranian tribes
- Outcome
- Polish victory; castle of Nakło surrendered
- Chronicle source
- Gallus Anonymus, Book III, Chapter 1
Location
Cause → Event → Consequence
Bolesław III, an expansionist ruler, launched a summer 1109 invasion of Pomerania partly as a strategic diversion ahead of an expected invasion by German king Henry V, who had been incited by Bolesław's half-brother Zbigniew. The declared aim was not merely to capture Nakło's castle but to force the Pomeranians into a decisive open battle.
On 10 August 1109, Bolesław's besieging Polish forces engaged and defeated a Pomeranian relief army at Nakło nad Notecią. Following the defeat of the relief force, the castle and city of Nakło surrendered to Polish control. Gallus Anonymus recorded the victory as one of Bolesław's greatest achievements, likening it to Otto I's victory at Lechfeld in 955.
After the battle Bolesław rushed south to confront the Imperial army at the Battle of Głogów. He later dispatched Bishop Otto of Bamberg to Christianize Pomerania. Pomeranian resistance continued under Duke Wartislaw I, and by 1181 his son Bogislaw I became a vassal of Holy Roman Emperor Frederick Barbarossa, ending direct Polish overlordship.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Duke Bolesław III Wrymouth.
Side B
1 belligerent