The Battle of Rio de Janeiro (also known as the Battle of Guanabara Bay)takes place on January 20, 1567. It was a small but significant skirmish in which a Portuguese force under Governor-General Mem de Sá attacked and destroyed the French settlement of Henriville.
The French, though greater in number, were forced to flee, allowing the Portuguese to reassert control over Guanabara Bay. The battle ended the French colonization attempt (France Antarctique) and solidified Portuguese rule.