Question: In what year was the US naval gun designed for the battleships to help Argentina counter Brazil's two "Minas Geraes"- class battleships?
Sentence (from "12&quot;/50 caliber gun (Argentina)"): The 12"/50 caliber "Bethlehem" gun was a US naval gun designed in 1910 as the main armament for the Argentine Navy’s dreadnought battleships of the "Rivadavia" class .
Relevant evidence: Yes