Complex sentence: After Alençon's capture Henry V took control of his duchy, giving it to his brother the Duke of Bedford-he would not regain Alençon until 1449, but remained the titular duke in the eyes of the French crown.
Split into simpler sentences: After Alençon's capture Henry V took control of his duchy, giving it to his brother the Duke of Bedford. He would not regain Alençon until 1449, but remained the titular duke in the eyes of the French crown.