February 5, 1885

Congo Free State

France recognizes the International Association of the Congo and settles its Congo boundary

The famous founding date is really the day Leopold's association traded one disputed region away to buy French recognition of everything else.

A boundary deal in Paris

On 5 February 1885 the French government and Leopold II's International Association of the Congo signed a convention in Paris delimiting their respective Central African claims.

The association relinquished the disputed Kouilou-Niari area to France; in return, France recognised its claim to the vast territory beyond the Congo River's left bank. The two sets of claims had overlapped near the Lower Congo, and settling that was necessary before the association could finish its campaign for international recognition.

Not the founding of a state

This was a bilateral recognition and boundary agreement. It was not Leopold's proclamation of the Congo Free State, not his assumption of sovereignty, and not his acquisition of the territory as private property.

Belgium's Chamber and Senate authorised Leopold to head the African state on 28 and 30 April. A royal decree of 29 May supplied the name Congo Free State, and notifications beginning 1 August announced his sovereignty and an exclusively personal union with Belgium.

Different accounts accordingly offer 5 February, 29 May, 1 July and 1 August as founding dates, because recognition, naming, domestic authorisation, proclamation and assumption of sovereignty were separate steps.

The Berlin Conference did not hand it over

Recognition came through bilateral agreements rather than a conference award. The General Act of the Berlin Conference did not name Leopold, the association or the Congo Free State.

Portugal concluded its own agreement on 15 February, and the conference participants celebrated the association's recognition on 23 February.

The United States declaration of 22 April 1884 recognised the association's flag as that of a friendly government and approved its stated purposes — narrower language than recognition of an already-existing sovereign state.

Sources

Researched 24 Aug 2026 6 sources not yet audited

How this was checked

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What the sources leave uncertain

February 5 is securely documented for the French–association convention, but the frequently repeated claim that Leopold established the Congo Free State that day is not supported by the legal chronology.
Belgium’s Chamber and Senate authorized Leopold to head the African state on April 28 and 30. A royal decree of May 29 named the Congo Free State, and notifications beginning August 1 announced Leopold’s sovereignty and the exclusively personal union with Belgium.
Calling the state Leopold’s “personal possession” captures his extraordinary personal control but can obscure its asserted legal form: an ostensibly sovereign state in personal union with Belgium, not ordinary privately titled real estate.