|Native name: Sūg|
Map of Sulu showing the location of Jolo
|Location||South East Asia|
|Major islands||Basilan, Jolo, Mapun (Cagayan de Tawi-Tawi), Tawi-Tawi|
|Area||869 km2 (336 sq mi)|
|Highest elevation||811 m (2,661 ft)|
|Municipalities||Indanan, Jolo, Kalingalan Caluang, Luuk, Maimbung, Old Panamao, Panglima Estino, Parang, Patikul, Talipao|
|Largest city||Jolo (pop. 87,998)|
|Population||447,700 (as of 2000)|
|Density||515.6 /km2 (1,335.4 /sq mi)|
|Ethnic groups||Banguingui, Bajau, Suluk/Tausug|
On that year, the Spanish launched a massive campaign to occupy Jolo. Spurred by the need to curb slave raiding once and for all and worried about the presence of other Western powers in the south (the British had established trading centers in Jolo by the 19th century and the French were offering to purchase Basilan Island from the cash strapped government in Madrid, Spain), the Spanish made a final bid to consolidate their rule in this southern frontier. On 21 February of that year, the Spaniards assembled the largest contingent against Jolo, consisting of 9,000 soldiers, in 11 transports, 11 gunboats, and 11 steamboats. Headed by Admiral Jose Malcampo captured Jolo and established a Spanish settlement with Capt. Pascual Cervera appointed to set up a garrison and serve as military governor; He served from March 1876 to December 1876 followed by Brig.Gen. Jose Paulin (December 1876-April 1877), Col. Carlos Martinez (Sept 1877-Feb 1880), Col. Rafael de Rivera (1880–1881), Col. Isidro G. Soto (1881–1882), Col. Eduardo Bremon, (1882), Col. Julian Parrrado (1882–1884), Col. Francisco Castilla (1884–1886), Col. Juan Arolas (1886-18930), Col. Caesar Mattos (1893), Gen. Venancio Hernandez (1893–1896) and Col. Luis Huerta (1896–1899).
The Spaniards were never secure in Jolo so by 1878 they had fortified Jolo with a perimeter wall and tower gates, built inner forts called Puerta Blockaus, Puerta España, and Puerta Alfonso XII; and two outer fortifications named Princesa de Asturias and Torre de la Reina. Troops, including a cavalry with its own lieutenant commander, were garrisoned within the protective confine of the walls. From Jolo, in 1880 Col. Rafael Gonzales de Rivera who was appointed the governor dispatched the 6th Regiment to Siasi and Bongao islands. The Spaniards were not secure in their stronghold because it would be sporadically attacked. On 22 July 1883, it is reported that three unnamed juramentado succeeded in penetrating the Jolo town plaza and killed three Spaniards.; The word “Ajuramentado” was coined by Spanish colonel Juan Arolas after witnessing several such acts while serving duty in Jolo garrison.
The Spanish and the Sultan of Sulu signed the Spanish Treaty of Peace on July 22, 1878. The Spanish-language version of the Treaty gave Spain complete sovereignty over the Sulu archipelago, this includes Basilan.
The Americans arrived in 1899, and by the turn of the century, the Philippine-American War was raging in Luzon. So as not to spread out their forces, the Americans employed the classic divide-and-rule tactic. 
The Bates Treaty of 1899 between Sulu Sultan Jamalul Kiram II and American Brigadier General John C. Bates, further acknowledged American administrative control over the Sulu Archipelago, including Basilan.
Initially Sultan Kiram was disappointed by the hand-over of control to the Americans and had expected to regain sovereignty over the Sulu archipelago after the defeat of the Spanish. Bates' main goal though, was to guarantee the Sultanate's neutrality in the Philippine-American War, and to establish order in Mindanao. After some negotiations, the Bates Treaty was signed.
This treaty was based on the earlier Spanish treaty, and it retained the translation discrepancy: the English version described a complete dependency, while the Tausug version described a protectorate. Although the Bates Treaty granted more powers to the Americans than the original Spanish treaty, the treaty was still criticized in America for granting too much autonomy to the Sultan. One particular clause, which recognized the Moro practice of slavery, also raised eyebrows in Washington, D.C. Bates later admitted that the treaty was merely a stop-gap measure, signed only to buy time until the war in the north was ended and more forces could be brought to bear in the south. The peace created by the Bates Treaty did not last, however. This became evident when the Muslims repudiated the Moro province, a politico-military government in Mindanao lasting from 1903 to 1914, and the Moro Rebellion soon broke out. It is important to note that barely two months before the creation of the Moro province, the American colonial government declared and classified all unoccupied lands as public lands. Immediately after the declaration, American investments entered Mindanao and mass migration of Christians was encouraged. (Rodil 1985:4). Jolo was occupied by the Japanese during World War II. On April 2, 1945, the Second Battalion of the U.S. 163rd Regiment, 41st Division (formerly the Montana National Guard) landed at Sanga Sanga and Bongao in the Sulu Archipelago, halfway between the island of Borneo and the Philippines. A week later, the other two battalions of the regiment left Mindanao and landed at Jolo, where they began fighting their way up heavily defended Mount Daho, the highest point on the island. The Sultan of Jolo, Muhammad Janail Abirin the 2nd, leader of the archipelago's 300,000 Moslems, welcomed Col. William J. Moroney, commander of the 163rd, and promised to help rid the island of Japanese. In three weeks of combat the 163rd suffered 37 dead and 191 wounded. Approximately 2,600 Japanese troops were killed, and only 87 Japanese soldiers were captured or surrendered on Jolo. Local fighters killed many Japanese stragglers hiding in the jungle after the Imperial Army surrendered in August, 1945.
Fighting on the island flared up again in February 2005 when between 4,000 and 5,000 Philippine troops clashed with around 800 Islamist militants from the Abu Sayyaf group, along with followers of Nur Misuari. Up to 12,000 people were thought to have fled the fighting. Fighting is still continuing today.
- Active volcanoes in the Philippines
- Potentially active volcanoes in the Philippines
- Inactive volcanoes of the Philippines
- Philippine Institute of Volcanology and Seismology
- Jolo, Sulu
- Beede, Benjamin R. (1994). The War of 1898, and U.S. Interventions, 1898-1934: An Encyclopedia. Taylor & Francis. p. 42. ISBN 9780824056247. Retrieved 8 March 2013.
- Glynn, Gary. Montana's Home Front During World War II, 2nd ed. Big Elk Books. 2012.
- "Jolo". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=0700-01%3D.
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