Bahia incident
1864 CE.
Shown on the map at -12.854°, -38.597°.
The Bahia incident was a naval skirmish fought in late 1864 during the American Civil War. A Confederate navy warship was captured by a Union warship in the Port of Salvador, Bahia, Brazil. The engagement resulted in a United States victory, but also sparked an incident between the United States and Brazil, over the American violation of Brazil's neutrality by illegally attacking a vessel in a Brazilian harbor.
Text from the Wikipedia article Bahia incident, licensed CC BY-SA 4.0.