Complex sentence: None of the major players were killed, as would be usual in this age of chieftains leading the line; however, Svein Ladejarl was chased off, and fled to Sweden, thus relinquishing his grip on power.
Split into simpler sentences: None of the major players were killed, as would be usual in this age of chieftains leading the line. However, Svein Ladejarl was chased off and fled to Sweden, thus relinquishing his grip on power.