| Battle of Kupa | |||||
|---|---|---|---|---|---|
|
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| Belligerents | |||||
| Littoral Croatian Duchy | Pannonian Croatia | ||||
| Commanders and leaders | |||||
| Borna | Ljudevit Posavski | ||||
| Strength | |||||
| Unknown | Unknown | ||||
The Battle of Kupa occurred at Kupa River in 819. It involved the Guduscans of Lika, led by Prince Borna of Croatia against Prince Ludevitus of County between Drava and Sava, who was Borna's nephew.
During the battle, the Guduscans abandoned Borna and joined Ljudevit. While Borna forces suffered massive losses, he managed to escape with his bodyguards. However, Dragomuž, Liudevit's father-in-law, who sided with Borna, was killed. According to Borna's reports, Liudevit suffered heavy casualties that included 3,000 soldiers and over 300 horses.
Liudevit used the momentum to invade Croatia in December 819.