Episode 4 of 5

Declaration of War

Name: Declaration of War
Start: 1825-12-10
Location: Empire of Brazil

When: 10 December 1825
Where: Empire of Brazil
Part of: Uruguay declares independence from the Empire of Brazil

Brazil formally declared war on the United Provinces, initiating the Cisplatine War.

Faced with the United Provinces' support for the insurgents, the Empire of Brazil formally declared war on the United Provinces on 10 December 1825. This led to a naval blockade on the River Plate.

Sources

Cisplatine War Wikipedia, revision of 2026-09-24

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.