Complex sentence: Ravivarma succeeded the throne in turbulent times as Achuyta Heggade was beheaded by Hyder Ali, the Muslim Ruler of Mysore after being captured in a conquest campaign.the royal family had fled to Tellicherry in present day Kerala during Hyder Ali's campaign and hence survived.
Split into simpler sentences: Ravivarma succeeded the throne in turbulent times as Achuyta Heggade was beheaded by Hyder Ali, the Muslim Ruler of Mysore after being captured in a conquest campaign. The royal family had fled to Tellicherry in present day Kerala during Hyder Ali's campaign and hence survived.