evidence: The leader of the rebel unit is the brother of Jamalul Kiram III, one of the two main claimants to the title of Sultan of Sulu. Back in the 17th century, before the Philippines existed in its present form, the two principle sultanates in the region were Sulu and Brunei. In 1658, the Sultan of Brunei for some reason gave Sabah to the Sultanate of Sulu, which today is considered part of the Philippines. However, the picture is further complicated by an 1878 deal between the Sultanate of Sulu and the British North Borneo Company, in which Sabah was leased to the Europeans on a rolling contract. To this day, the Malaysian government pays a token sum, equivalent to around $1,500, to the Philippines every year in recognition of this continuing arrangement. The Royal Army of Sulu interprets this deal as a lease that can be canceled, while Malaysia believes that it represents the permanent transfer of the territory.