Complex sentence: A childhood friend of Dario, Erec followed his natural talent and joined the Brotherhood of Knights, who went to war in the East Erec returns to Ridgewood, with quite a sizable army to meet up with his old friend.
Split into simpler sentences: A childhood friend of Dario, Erec followed his natural talent and joined the Brotherhood of Knights, who went to war in the East. Erec then returns to Ridgewood, with quite a sizable army to meet up with his old friend.