The Battle of Kerlés (Hungarian: kerlési csata) or Battle of Chiraleș, also known as the Battle of Cserhalom, was an engagement between an army of Pechenegs and Ouzes commanded by Osul and the troops of King Solomon of Hungary and his cousins, Dukes Géza and Ladislaus, in Transylvania in 1068. The Pechenegs had been the dominant power of the westernmost regions of the Eurasian steppes since around 895. However, large Pecheneg groups moved to the Balkan Peninsula at the same time as the westward migration of the Ouzes and Cumans in the 1040s. The first recorded Pecheneg invasion of Transylvania occurred during the reign of Stephen I of Hungary (r. 997–1038).