The Sultan gave proof of military prowess in an expedition to
Siau Island in 1677, which turned out to be a success. This contributed in strengthening his royal authority to the detriment of older, consensus-based forms of governance. One aristocrat who felt threatened by Sibori Amsterdam's policy was his brother-in-law Kaicili Alam (d. 1684), the heir to the defunct
Jailolo kingdom, who sought and found sanctuary at the Dutch
Fort Oranje on Ternate, to the great irritation of the Sultan. Shortly after, the three most important officials of the kingdom, the
Jogugu (first minister), the
Kapita Laut (the sea lord) and the
Hukum (magistrate), fled to Ternate's traditional rival, the
Tidore Sultanate, after which Sibori Amsterdam abolished the
Jogugu position altogether for a while. Later on, Kaicili Alam found favour with the Sultan because of his warlike feats and was made
Jogugu of Ternate. In the meanwhile, the VOC policy of forcing the Ternatan elite to extirpate clove trees in the realm to ensure VOC monopoly, met with growing resentment. The ties between the center of the kingdom and its outlying dependencies became strained, which at length affected relations between the Sultan and the VOC. Sibori Amsterdam fell out with the VOC governor Robertus Padtbrugge, not least because of the latter's promotion of Christian missionaries in the staunchly Islamic kingdom. The Sultan reportedly circulated a letter in the
Ambon Quarter enjoining the chiefs to massacre the Dutch. The errand was however discovered and cruelly executed by the VOC in Ambon. Next, Sibori Amsterdam invited Robertus Padtbrugge for a banquet in his palace. The atmosphere was tense and the European guests feared assassination. Eventually the governor's daughter simulated a swoon and so gave Padtbrugge and his entourage an excuse to withdraw. Next day, however, several Dutch soldiers were murdered. Sibori Amsterdam hastily brought his harem, Bobatos (chiefs) and artillery to Jailolo on
Halmahera in open defiance of the Company. The rebellion, which broke out in 1679, had a pronounced religious side, and Muslim preachers from
Banten were active in inspiring anti-Dutch insurgency. Some areas, such as North Halmahera and
Bacan supported the Sultan, while Ternate's old rival, the Tidore Sultanate, backed up the Dutch positions and contributed with
korakoras (large outriggers used in warfare). Sibori's attempts to enlist support from the Muslims of
Mindanao were unsuccessful. The main Ternatan strongholds in Halmahera, Sahu and Gamkonara, fell to the VOC forces in 1681, and internal divisions among the rebels spelled the end of the movement. Sibori Amsterdam, abandoned by most of his followers, was finally captured in a bath house in August 1681 while he was massaged with fragrant oils by ladies of his harem. ==Vassal under the VOC==