Complex sentence: Following the Battle of Kappel, Bremgarten was re-catholicized, and on 21 October, Bullinger fled to Zürich with his father, and on 9 December was declared Zwingli's successor.
Split into simpler sentences: Following the Battle of Kappel, Bremgarten was re-catholicized. On 21 October, Bullinger fled to Zürich with his father, and on 9 December was declared Zwingli's successor.