Aceh War (1873-1904): The Dutch Struggle to Conquer Sumatra

The Aceh War was the longest and costliest colonial war fought by the Netherlands. It began in 1873 when the Dutch attacked the independent Sultanate of Aceh at the northern tip of Sumatra, and it lasted, in its main phase, until about 1904. Tens of thousands died, and the conflict shaped both Dutch colonial policy and the later Indonesian struggle for independence.

Background: Aceh and the Strait of Malacca

Aceh was a Muslim sultanate with a long history of trade and religious scholarship, known in the sixteenth and seventeenth centuries as a major power in the region. Under Sultan Iskandar Muda, who ruled from 1607 to 1636, it controlled much of the coast of northern Sumatra and parts of the Malay Peninsula, and it was sometimes called the “Veranda of Mecca” because pilgrims to Arabia sailed from its ports. By the nineteenth century it was the world’s leading supplier of pepper, and its ports traded with Penang, Singapore and the wider Indian Ocean. Its sultans held limited authority over powerful local chiefs, called uleebalang, who controlled the pepper districts.

The Dutch had extended their rule over much of the archipelago since the days of the Dutch East India Company, fighting wars such as the Java War of 1825 to 1830. In the Anglo-Dutch Treaty of 1824 the Netherlands had agreed to respect Aceh’s independence. The opening of the Suez Canal in 1869 made the nearby Strait of Malacca far more important, and the Dutch feared that another power might gain a foothold in Aceh.

In November 1871 the Anglo-Dutch Treaty of Sumatra gave the Netherlands a free hand in northern Sumatra, in exchange for the transfer of the Dutch forts on the Gold Coast of West Africa to Britain and equal trading rights for British subjects. When Aceh’s envoys sought help from the Ottoman Empire and held talks with the American consul in Singapore in early 1873, the Dutch decided to act.

The first campaigns, 1873-1874

The Netherlands declared war on Aceh on 26 March 1873. A first expedition of about 3,000 men under General J. H. R. Köhler landed in April, but Köhler was killed on 14 April near the Great Mosque of the capital, and the force withdrew after heavy losses. The defeat was a shock in the Netherlands.

A much larger second expedition under General Jan van Swieten landed in December 1873. After weeks of fighting and an outbreak of cholera, the Dutch occupied the sultan’s palace, the kraton, in January 1874. Sultan Mahmud Syah had already left and died of cholera soon afterwards. The Dutch declared Aceh annexed, believing the war was over.

Guerrilla war

It was not over. Acehnese chiefs proclaimed a new sultan and continued to fight from the interior and the hills. From the 1880s the resistance was increasingly led by ulama, Islamic scholars, who called it a holy war. The most important was Teungku Chik di Tiro, who led attacks until his death in 1891.

The Dutch, short of money and troops, retreated in 1884 behind a “concentrated line” of forts around their base at Kutaraja (now Banda Aceh), which in practice left most of Aceh outside their control. Ambushes, raids and disease wore down the garrison, much of which consisted of soldiers recruited from Java, Ambon and other parts of the archipelago, as well as Africans and Europeans.

The most famous episode involved Teuku Umar, an Acehnese leader who surrendered to the Dutch in 1893 and was given weapons, money and troops to fight the resistance. In 1896 he returned to the Acehnese side with his arms and men, a humiliation for the colonial government. He was killed in a Dutch ambush near Meulaboh in February 1899.

Snouck Hurgronje and the final conquest

The scholar Christiaan Snouck Hurgronje, who had studied Islam and lived for several months in Mecca in 1884 and 1885, was sent to Aceh in 1891 to advise the government. His report, published as De Atjehers (The Acehnese), argued that the sultan mattered little, that the uleebalang could be won over with recognition of their authority, and that the ulama-led resistance had to be broken by force.

From 1898 Colonel, later General, J. B. van Heutsz became military governor and applied this approach. Small mobile units of the Korps Marechaussee, founded in 1890 and drawn largely from Indonesian soldiers, pursued resistance leaders deep into the interior, while cooperating chiefs signed a “Short Declaration” (Korte Verklaring) accepting Dutch sovereignty. Sultan Muhammad Daud Syah surrendered in January 1903, and van Heutsz became Governor-General of the Dutch East Indies in 1904.

The final campaigns were brutal. In 1904 a column under G. C. E. van Daalen marched through the Gayo and Alas highlands, and Dutch records counted roughly 2,900 people killed, more than 1,100 of them women and children. Photographs of the dead, published in the Netherlands, caused a political controversy.

Snouck Hurgronje’s role has also been debated ever since. He was one of the leading scholars of Islam of his time, and his studies of Acehnese society remain valuable, but he placed that knowledge in the service of conquest. He himself later criticised the violence of van Daalen’s campaigns and argued that the colonial government should rule through cooperation with local elites.

Key people

• Teuku Umar (c. 1854–1899): Acehnese commander famous for his switch to the Dutch side and back again.
• Cut Nyak Dhien (c. 1848–1908): Teuku Umar’s wife, who led fighters after his death until her capture in 1905; she died in exile in Sumedang, West Java.
• Teungku Chik di Tiro (1836–1891): Islamic scholar who led the religious resistance in the 1880s.
• Christiaan Snouck Hurgronje (1857–1936): Dutch Islamic scholar and colonial adviser.
• J. B. van Heutsz (1851–1924): Military governor of Aceh and later Governor-General.

Consequences and legacy

Casualty figures are uncertain. Deaths on the Dutch side, most from disease and many among Indonesian soldiers and forced labourers, are often given as around 37,000. Acehnese deaths are usually estimated at 60,000 to 70,000, and some historians suggest more. Resistance continued in parts of Aceh until about 1910, and attacks on Dutch personnel occurred even later.

The war completed Dutch control of the archipelago and made van Heutsz a national hero in the Netherlands, although his reputation is now much more disputed. In Indonesia, Teuku Umar, Cut Nyak Dhien and other resistance leaders are honoured as national heroes, and Aceh played an important role in the Indonesian National Revolution after 1945. The Kerkhof Peutjut cemetery in Banda Aceh holds the graves of more than 2,000 Dutch-side soldiers.

Timeline

• 1871, 2 November: The Anglo-Dutch Treaty of Sumatra gives the Netherlands a free hand in Aceh.
• 1873, 26 March: The Netherlands declares war on Aceh.
• 1873, 14 April: General Köhler is killed; the first expedition withdraws.
• 1874, January: The second expedition takes the sultan’s palace.
• 1884: The Dutch withdraw behind the “concentrated line” around Kutaraja.
• 1896: Teuku Umar returns to the resistance with Dutch weapons.
• 1899, 11 February: Teuku Umar is killed near Meulaboh.
• 1903, January: Sultan Muhammad Daud Syah surrenders.
• 1904: Van Daalen’s expedition in the Gayo and Alas lands; Aceh declared pacified.

Why it matters

The Aceh War showed how difficult and costly colonial conquest could be against a determined society. It shaped Dutch methods of colonial warfare and the use of scholarly advice in governing Muslim subjects, and it left a lasting memory of resistance in Aceh and in Indonesia as a whole.