What two factors led to the US being considered a powerful nation during World War I? The battle of Belleau Wood proved to the w
orld the strength of the US armed forces. The economic strength of the US led to greater respect from leaders of other countries. The advancement of US military weapons was greater than any other country. The Battle of Amiens was a turning point in the Allies' favor following US entry. The Treaty of Versailles turned the US into a peacekeeping nation.
If im correct the answer should be Submarines and mines were an inexpensive and better way to engage battleships. I hope this helps. let me know if it doesnt