In 1865, Negros and its outlying minor islands along with Siquijor was converted into a politico-military province. In 1890, the island was officially partitioned into the present-day provinces of Negros Occidental and Negros Oriental. The Spanish Governor, D. Isidro Castro y Cinceros, surrendered to the Negros Revolutionaries, led by Aniceto Lacson and Juan Araneta, on 6 Nov. 1898. General Miller appointed Aniceto, Governor of the Island in March 1899. From 3 to 6 November 1898, the Negrense peoples rose in revolt against the local Spanish colonial government headed by politico-military governor Colonel Isidro de Castro. The Spaniards decided to surrender upon seeing armed troops marching in a pincer movement towards Bacolod. The revolutionaries, led by General Juan Araneta from Bago and General Aniceto Lacson from Talisay, bore fake arms consisting of rifles carved out of palm fronds and cannons of rolled bamboo mats painted black. By the afternoon of 6 November, Col. de Castro signed the Act of Capitulation, thus ending centuries of Spanish colonial rule in Negros Occidental. In memory of this event, every November 5 is observed as a special non-working holiday in the province through Republic Act No. 6709, signed by President Corazon Aquino on 10 February 1989. On 27 November 1898, the Cantonal Republic of Negros unilaterally proclaimed independence, but this was short-lived as the territory became a protectorate of the United States on 30 April 1899. The state was renamed the Republic of Negros () on 22 July 1899, and eventually dissolved by the United States and annexed by the U.S. Military Government of the Philippine Islands on 30 April 1901. The leaders of the short-lived republic were:  From 1914 to 1927, parts of Western Negros hosted several newly established settlements which became cities connected by railroads constructed to flow towards several "sugar centrals" which were processing the extremely sweet raw sugar canes grown in Negros' volcanic soil and farmed by several "Haciendas". These haciendas littered the countryside as the central sugar mills eventually grew to become full pledged towns and cities: chief among which were Ilog, Hinigaran, La Carlota, Silay, Pulupandan, Bacolod, San Carlos and Bais  Western Negros also saw massive immigration from Panay as the Spanish, Chinese, and French mestizos who administered the Haciendas imported laborers from Panay island to foster the farming of Negros' sugar plantations and thereby displacing the Cebuano speaking natives.