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Formal Declaration of the Blockade

Name: Formal Declaration of the Blockade
Start: 1845-09-18
Location: Buenos Aires

When: 18 September 1845
Where: Buenos Aires
Part of: Anglo-French blockade of the Río de la Plata is formally declared

The Anglo-French blockade was formally declared on 18 September 1845, closing Buenos Aires to maritime commerce.

The blockade was imposed by the Royal Navy and French Navy in 1845 against the Río de la Plata Basin. The formal declaration occurred on 18 September 1845, resulting in the closure of Buenos Aires to maritime commerce to support the Colorado Party in Uruguay's civil war.

Sources

Anglo-French blockade of the Río de la Plata Wikipedia, revision of 2026-09-13

Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.