Complex sentence: His Maravas ravaged Tirunelveli country so much that Yusuf Khan himself realised that he could not crush them by force so he bribed many of them to join his side.
Split into simpler sentences: His Maravas ravaged Tirunelveli country so much and Yusuf Khan himself realised that he could not crush them by force. So he bribed many of them to join his side.