Complex sentence: Encounters between the Visigoths and Basques usually led to defeat for the latter and the Visigoths managed to establish an outlying post at the later city of Vitoria to counter incursions and the migration of basques from the coastal regions to the north.
Split into simpler sentences: Encounters between the Visigoths and Basques usually led to defeat for the latter. The Visigoths established an outlying post at the later city of Vitoria to counter incursions and the migration of basques from the coastal regions to the north.