Belgian Revolution (1830): Birth of an Independent Belgium

The Belgian Revolution was the revolt of 1830–1831 in which the southern provinces of the United Kingdom of the Netherlands broke away to form the independent Kingdom of Belgium. It began with a riot after an opera performance in Brussels on 25 August 1830, turned into armed resistance against Dutch troops, and ended with the great powers accepting a new, neutral state under King Leopold I.

Background: an uneasy union

At the Congress of Vienna in 1815, the victors over Napoleon joined the former Austrian Netherlands to the Dutch Republic, creating a strong buffer state against France under King William I of the House of Orange-Nassau. The south was more populous, with roughly 3.5 million people against about 2 million in the north, yet each half had the same number of seats in the States General.

Southern grievances grew through the 1820s. Most officers and senior officials were Dutch, a policy promoted Dutch as the official language in the Flemish provinces, and the south shared the burden of the large Dutch national debt. Catholics objected to state control over education, while liberals attacked press censorship. In 1828 these two normally opposed groups formed a “union of oppositions” against the king.

The night at the opera

News of the July Revolution in Paris raised tension. On 25 August 1830 the Théâtre de la Monnaie in Brussels staged Daniel Auber’s opera La Muette de Portici, about a revolt in Naples against Spanish rule. During the duet “Amour sacré de la patrie” (Sacred love of the fatherland), members of the audience rushed out and joined crowds in the streets.

Rioters attacked the houses of unpopular officials and the offices of a pro-government newspaper. Middle-class citizens formed civic guards to keep order, and at first most leaders sought only administrative separation within the kingdom, not independence. Crown Prince William of Orange negotiated in Brussels in early September, but his father refused quick concessions.

The September Days

On 23 September 1830 Prince Frederick, the king’s second son, led a Dutch army of roughly 10,000 to 14,000 men into Brussels to restore royal authority. Volunteers from Brussels and other towns resisted from barricades and from the park facing the royal palace. After four days of fighting, the Dutch withdrew on the night of 26–27 September.

The September Days turned a protest into a war of independence. A provisional government that included Charles Rogier, Sylvain Van de Weyer and Félix de Mérode proclaimed Belgian independence on 4 October 1830. On 27 October Dutch forces holding the citadel of Antwerp bombarded the city, hardening opinion further.

Building a new state

A National Congress elected in November 1830 confirmed independence and excluded the House of Orange-Nassau from the throne. Britain, France, Austria, Prussia and Russia, meeting in London, accepted Belgian independence in principle on 20 December 1830 and soon guaranteed its neutrality.

On 7 February 1831 the Congress adopted a constitution that was among the most liberal in Europe, with guarantees of press freedom, religious freedom and parliamentary government. After France declined the crown for a son of Louis-Philippe, the Congress chose Leopold of Saxe-Coburg, who was acceptable to Britain. He swore the constitutional oath on 21 July 1831.

Dutch counter-attack and final settlement

William I refused to accept the loss. In the Ten Days’ Campaign of August 1831 the Dutch army defeated the Belgian forces, but withdrew when a French army entered the country. French troops later besieged and took the citadel of Antwerp in December 1832. The Treaty of London of 19 April 1839 finally brought Dutch recognition, while Limburg and Luxembourg were divided between the two sides.

Key people

King William I of the Netherlands was an energetic moderniser who promoted roads, canals and industry in the south, but his autocratic style and refusal to compromise alienated many Belgians. His sons played contrasting roles: the popular Crown Prince William tried to mediate in Brussels, while Prince Frederick led the failed military attempt to retake the city.

Among the revolutionaries, Charles Rogier, a young liberal journalist from Liège, led volunteers to Brussels and became a leading member of the provisional government and later a long-serving minister. Sylvain Van de Weyer, a lawyer, represented Belgium in London and helped win British support. Baron Érasme-Louis Surlet de Chokier presided over the National Congress and served as regent until Leopold arrived.

Leopold I himself proved a shrewd choice. Widower of Princess Charlotte of Wales and uncle of the future Queen Victoria, he had close links to the British court, and in 1832 he married Louise of Orléans, daughter of the French king, which bound Belgium to both of its powerful neighbours.

Timeline

• 1815: The Congress of Vienna creates the United Kingdom of the Netherlands.
• 1830, 25 August: Riots follow a performance of La Muette de Portici in Brussels.
• 1830, 23–26 September: The September Days; Dutch troops are driven out of Brussels.
• 1830, 4 October: The provisional government proclaims Belgian independence.
• 1830, 20 December: The London Conference accepts Belgian independence in principle.
• 1831, 7 February: The National Congress adopts the Belgian constitution.
• 1831, 21 July: Leopold I takes the oath as King of the Belgians.
• 1831, 2–12 August: The Ten Days’ Campaign; a French army forces the Dutch to withdraw.
• 1839, 19 April: The Treaty of London; the Netherlands recognises Belgium.

Why it matters

The Belgian Revolution was the first major redrawing of the 1815 map of Europe, carried out with the agreement of the great powers rather than against them. The neutrality guaranteed by the 1839 treaty became a cornerstone of European diplomacy, and its violation in the German invasion of Belgium in 1914 brought Britain into the First World War.