Who began aiding Uruguay against Argentina, leading to Rosas declaring war?
France
Great Britain
Empire of Brazil
Spain
Answer
In 1836, Uruguay and Argentina were at war. Argentina, led by Juan Manuel de Rosas, had invaded Uruguay, which had been independent from Argentina since 1828. The Empire of Brazil, which had close ties to Uruguay, began aiding Uruguay against Argentina. This led to Rosas declaring war on Brazil in 1838.
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