June 17, 1839

The Treaty of London guarantees Belgian neutrality and independence, recognizing Belgium as a kingdom independent from the Netherlands.


London, United Kingdom | European powers

Watercolor painting based depiction of The Treaty of London guarantees Belgian neutrality and independence, recognizing Belgium as a kingdom independent from the Netherlands. (1839)

The Treaty of London - June 17, 1839

On June 17, 1839, the Treaty of London, also known as the “First Treaty of London” or the “Treaty of Separation,” played a pivotal role in establishing Belgium as an independent and neutral state, free from Dutch control.

Context and Background

The seeds for this treaty were sown in the Belgian Revolution of 1830, when the southern provinces of the United Kingdom of the Netherlands rebelled against King William I. The rebellion arose from cultural, religious, and economic differences between the predominantly Catholic, French-speaking south (Belgium) and the Protestant, Dutch-speaking north (Netherlands). The conflict ultimately resulted in Belgium declaring its independence on October 4, 1830.

In response to this declaration, an international conference was convened in London in November 1830, consisting of major European powers, including Britain, France, Prussia, Austria, and Russia. The aim was to mediate the conflict and ensure stability in the region.

Content of the Treaty

The Treaty of London, signed on April 19, 1839, came after years of diplomatic negotiations and conflict resolution efforts. Here are the key elements of the Treaty:

  • Recognition of Independence: The treaty formally recognized Belgium as a sovereign and independent kingdom.

  • Territorial Boundaries: It delineated the borders between Belgium and the Netherlands, establishing a clear and internationally recognized boundary.

  • Neutrality: One of the crucial stipulations was the perpetual neutrality of Belgium. The signatory powers, by endorsing this neutrality, agreed to protect Belgium from aggression and ensure its independence.

  • Economic Considerations: The treaty also contained clauses related to the economic relationship between Belgium and the Netherlands, focusing on the navigation of the Scheldt River, an essential outlet for Belgian trade.

Historical Significance

The Treaty of London is significant for several reasons:

  1. Diplomatic Precedent: It set an important diplomatic precedent by using international diplomacy and treaties to resolve conflicts and recognize new nation-states.

  2. Base for Belgian Sovereignty: It laid the foundation of Belgian national sovereignty and was crucial in Belgium’s eventual development as a modern state.

  3. Long-term Stability and Peace: The neutrality clause ensured Belgium’s peace and security amidst the shifting alliances and conflicts in Europe, playing a critical role in safeguarding its territory during future European conflicts.

  4. Influence on World War I: The neutrality of Belgium would later become a central issue at the outbreak of World War I in 1914 when Germany violated Belgian neutrality, prompting Britain to declare war on Germany.

The Treaty of London was a landmark in international relations, exemplifying a collective European agreement to recognize new national entities and commit to the principles of neutrality and non-aggression.