Croatian–Bulgarian battle of 926

In 926 a battle was fought in the Bosnian highlands between the armies of the Bulgarian Empire, under the rule of Bulgarian Tsar Simeon I, who at the time also fought a war with the Byzantine Empire, and the Kingdom of Croatia under Tomislav, the first king of the Croatian state. The battle is also known as the Battle of the Bosnian Highlands (Bulgarian: Битка при Босненските планини, Croatian: Bitka na Bosanskim visoravnima). It was fought in the Dinaric Alps of Eastern Bosnia near the rivers Bosna and Drina, the border area between the Kingdom of Croatia and the Bulgarian Empire.

Principal information on the battle is provided by the emperor Constantine VII of the Byzantine Empire in his work De Administrando Imperio ("On the Governance of the Empire") and in the collection of preserved historical writings called Theophanes Continuatus. Simeon's aim was to defeat the Byzantine Empire and conquer Constantinople. To achieve his aim, Simeon overran the eastern and central Balkans several times, occupied Serbia and finally attacked Croatia. The result of the battle was an overwhelming Croatian victory.