Bruneian Civil War

Bruneian Civil War
The Sulu Sultanate claimed that the eastern part of Sabah was reportedly given by Brunei as reward for helping Sultan Muhyiddin's forces.
Date 1660 to 1673 Location Bruneian Sultanate Sabah and Sarawak (under Brunei) Result Victory for Muhyiddin of Brunei: Abdul Hakkul Mubin killed.
Belligerents
Sultan Abdul Hakkul Mubin's Forces	Sultan Muhyiddin of Brunei's Forces Rebels from Sultan Muhammad Ali's followers (against Abdul Hakkul Mubin) Kedayan and Bajau Tribes Sulu Forces Supported by': Jambi
Commanders and leaders
Abdul Hakkul Mubin  †	Muhyiddin Pengiran Adipati Sultan Salahud-Din Bakhtiar

The Bruneian Civil War (Malay: Perang Saudara Brunei and in Tagalog: Digmaang Sibil sa Brunay) was a civil war in the Bruneian Sultanate from 1660 to 1673.^[1][2][3] Between Abdul Hakkul Mubin and Muhyiddin. During Sultan Muhammad Ali's reign, a dispute led to the killing of Pengiran Muda Alam by Pengiran Muda Bongsu. In retaliation, Abdul Hakkul Mubin killed Muhammad Ali and declared himself the fourteenth sultan. A civil war ensued, with Abdul Hakkul Mubin fleeing to Kinarut. Sultan Muhyiddin sought help from the Sultan of Sulu, promising the area of Kimanis as a reward. As it turns out the Sulu Sultanate made a false claim over the entire Sabah. The dispute over eastern Sabah remains a legacy of this civil war.