Sultanate of Bima has been bound by government of Dutch colonial with Lange Contract agreement (long contract), occurred in 1908-1909 That the Sultanate of Bima is a very strategic area. These conditions caused the VOC and the government of Dutch to seek intervention through the Lange Contract agreement (long contract) which has led to the entry of the Sultanate of Bima in the Pax Neerlandica neighborhood. War of Ngali occurred for several reasons namely 1) Feelings of dissatisfaction with the actions of the Dutch government which impose various tax rules in the Sultanate of Bima. 2) The Sultanate of Bima as part of the Dutch East Indies sovereignty was seized by a Lange Contract agreement in 1908. 3) Customary law and Islamic law were replaced by Dutch law. 4) The head or belasting duty system is denied and punished for taxing the unbelievers. The conclusion in this study is that people of Ngali against the government of Dutch colonial because they wanted to control the entire Milky, the resistance made by people Ngalisolely to maintain the customs, religions, and independence owned by the people of Bima.