Complex sentence: In 1835 the nearby region of Paddar was taken from Chamba (now in Himachal Pradesh) in the course of a battle ---it later became known for its sapphire mines.
Split into simpler sentences: In 1835 the nearby region of Paddar was taken from Chamba (now in Himachal Pradesh) in the course of a battle. Paddar later became known for its sapphire mines.