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Sulu Archipelago

geography Maturity 7-9 Next article →

The Sulu Archipelago is a long chain of islands in the Pacific Ocean.

Sulu Islands Group, PH, Sentnel-2
Sulu Islands Group, PH, Sentnel-2

It is located in the southwestern Philippines within the Mindanao island group. This archipelago serves as a natural boundary for two major bodies of water. It forms the northern limit of the Celebes Sea. Simultaneously, it marks the southern limit of the Sulu Sea. The islands are often grouped into the provinces of Basilan, Sulu, and Tawi-Tawi. Because of these three provinces, the area is sometimes called Basulta.

Panguan Island
Panguan Island

The geological origin of these islands is a common point of misunderstanding. Many people assume the chain is the remains of a land bridge connecting Borneo to the Philippines. However, the islands are actually the exposed edges of small submarine ridges. These ridges were created by the tectonic tilting of the sea bottom. Some islands, such as Basilan, Jolo, and Tawi-Tawi, are extinct volcanic cones. An extinct volcanic cone is a volcano that is no longer active. The southernmost island, Tawi-Tawi, features a serpentine basement-complex core. This core is covered by a layer of limestone. Beyond geology, the chain serves as an essential migration route for various bird species.

The archipelago is geographically organized into several distinct island groups. The most significant groups are centered around the main islands of Basilan, Jolo, and Tawi-Tawi. Other groups consist of smaller, often uninhabited islands. The Basilan group includes islands like Pilas. The Jolo group contains Capual, Pata, Tongquil, and Keenapusan. There is also the Laparan group, which includes Deatoboato, Cap Island, and the Pearl Bank atoll. The Pangutaran group includes Kulasssein and Panducan. The Sibutu group consists of islands like Andulinang, Mardanas, and Omapoy. Finally, the Tawi-Tawi group includes Bongao, Manuk, and Simunul. Other outliers include the Mapun and the Turtle Islands.

Human history in the region is deeply connected to powerful maritime states. The archipelago was once part of the Majapahit empire. It is even mentioned in the Old Javanese eulogy, the Nagarakretagama, as Solot. Later, the area became part of the Bruneian Sultanate. In 1405, the independent Sultanate of Sulu was founded by Shari’ful Hashem Syed Abu Bak’r.

Pre1636 sulupre1636 sulu ph
Pre1636 sulupre1636 sulu ph

This sultanate was a thalassocracy, which is a state that uses its power to control the sea. At its height, the sultanate included parts of Borneo, Mindanao, and Palawan.

1636-1748 sulu ph
1636-1748 sulu ph

The region was also home to many diverse groups of people.

The indigenous population includes the Tausūg people and various Sama peoples. These include the land-based Sama, the Yakan, and the Jama Mapun. Some Sama groups, known as the Bajau, are semi-nomadic. This means they move from place to place rather than staying in one permanent home. Languages are very diverse across the islands. Tausūg is widely spoken as both a first and second language. The Yakan language is primarily spoken on Basilan Island. Many different dialects of Sinama are also heard throughout the archipelago.

Conflict arose when Western powers arrived in the region. The Spanish Empire sought to expand its control over the Spanish East Indies. This led to centuries of military expeditions and resistance. In 1578, Francisco de Sande sent an expedition to Jolo. This resulted in a compromise where the Sulu sultan paid tribute in pearls. However, tensions remained high for hundreds of years. In 1638, Governor Sebastián Hurtado de Corcuera led 80 ships and 2,000 troops to attack Jolo.

1764-1848 sulu ph
1764-1848 sulu ph

Despite many large-scale attacks, the Spanish often struggled to maintain control. In 1848, Governor General Narciso Claveria used powerful gunboats to attack the Balangingi stronghold. This campaign significantly weakened the maritime power of the Sulu Sultanate.

During the 18th and 19th centuries, other global powers also entered the area. Great Britain established trading alliances with the Sulu Sultanate through the British East India Company.

万国来朝图 Sulu Archipelago (苏禄国) delegates in Peking in 1761
万国来朝图 Sulu Archipelago (苏禄国) delegates in Peking in 1761

The British Royal Navy even established a base in Sulu and bombarded Fort Pilar in Zamboanga in 1798. The archipelago has seen many shifts in administration. It transitioned from Spanish rule to eventually becoming part of the Philippines. The history of the region is marked by these shifting alliances and long periods of resistance.

1848-1899 sulu ph
1848-1899 sulu ph

Today, the area remains a vital part of the southwestern Philippines.

1972 present sulu ph
1972 present sulu ph
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🖼️ Images & Media (13)
File:Sulu Islands Group, PH, Sentnel-2.jpg
Sulu Islands Group, PH, Sentnel-2.jpg
File:Panguan_Island.jpg
Panguan_Island.jpg
File:Illanoan Pirates.png
Illanoan Pirates.png
File:Pre1636 sulupre1636 sulu ph.jpg
Pre1636 sulupre1636 sulu ph.jpg
File:1636-1748 sulu ph.jpg
1636-1748 sulu ph.jpg
File:万国来朝图 Sulu Archipelago (苏禄国) delegates in Peking in 1761.jpg
万国来朝图 Sulu Archipelago (苏禄国) delegates in...
File:1764-1848 sulu ph.jpg
1764-1848 sulu ph.jpg
File:1848-1899 sulu ph.jpg
1848-1899 sulu ph.jpg
File:Bombardment Balanguingui.jpg
Bombardment Balanguingui.jpg
File:1899-1935 sulu ph.jpg
1899-1935 sulu ph.jpg
File:1935-1946 sulu ph.jpg
1935-1946 sulu ph.jpg
File:1946-1972 sulu ph.jpg
1946-1972 sulu ph.jpg

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