What was the battle of monmouth courthouse important? question 6 options: after the changes and training at valley forge, it proved that the continental army could fight almost as well as the british army this battle was a defeat for the continental army and proved that they would likely not win the war british spies had the ability to let the british army know everything the americans were doing this battle defeated the hessian mercenaries and showed that the americans could drive the enemy out of connecticut.