Battle of El Espinillo
1893 CE.
Shown on the map at -32.953°, -60.602°.
The battle of El Espinillo was a naval engagement between warships of the Argentine Navy that took place during an insurrection on 29 September 1893 on the Paraná River, along El Espinillo Island, Entre Ríos, on the opposite bank from the city of Rosario, Santa Fe. The action was the result of a rebellion against the National Government led by the Radical Civic Union (UCR) party, known as the Argentine Revolution of 1893. It was the largest battle involving armoured naval units in Argentina.
Text from the Wikipedia article Battle of El Espinillo, licensed CC BY-SA 4.0.