Complex sentence: Meanwhile, the Sueves in the north chosen one Rechimund as their leader, plundering Galicia in 459 and 460, and this same year they captured the walled city of Lugo, which was still under the authority of a Roman official.
Split into simpler sentences: Meanwhile, the Sueves in the north chose another leader, Rechimund, who plundered Galicia in 459 and 460. This same year they captured the walled city of Lugo, which was still under the authority of a Roman official.