Complex sentence: Immediately she had to fight to keep her son in line on the throne from two powerful enemies in Archbishop Jacob Erlandsen who excommunicated the bishop who anointed young Erik as king, and Duke Valdemar of southern Jutland.
Split into simpler sentences: Immediately she had to fight to keep her son in line for the throne. She had two powerful enemies in Archbishop Jacob Erlandsen who excommunicated the bishop who anointed young Erik as king, and Duke Valdemar of southern Jutland.