Complex sentence: In ancient times, the region was split between the Roman provinces of Raetia (left of the Inn River) and Noricum and from the mid- 6th century was resettled by Germanic Bavarii tribes.
Split into simpler sentences: In ancient times, the region was split between the Roman provinces of Raetia (left of the Inn River) and Noricum. From the mid- 6th century it was resettled by Germanic Bavarii tribes.