Complex sentence: Muhtarram Shah Kator the III was succeeded by his second son, Aman ul-Mulk, in order to succeed Aman ul-Mulk had killed his elder brother in 1856.
Split into simpler sentences: Muhtarram Shah Kator the III was succeeded by Aman ul-Mulk. In order to succeed Aman ul-Mulk had killed his elder brother in 1856.