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.
Date1660–1673
Location
North Borneo (Sabah and Sarawak; present-day of Malaysia and Brunei)
Result Victory for Muhyiddin's faction
Territorial
changes
Eastern part of Sabah was given to Sulu Sultanate as reward for helping Muhyiddin's forces
(Sulu claim narrative; disputed)
Belligerents
Abdul Hakkul Mubin's forces
Commanders and leaders
Abdul Hakkul Mubin  Muhyiddin
Pengiran Adipati
Sultan Salahud-Din Bakhtiar
Strength
Unknown Unknown soldiers
Gunpowder from Jambi

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 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. The dispute over eastern Sabah remains a legacy of this civil war.