Still, battleships played a part in major engagements in Atlantic, Pacific and Mediterranean theatres. In the Atlantic, the Germans experimented with taking the battleship beyond conventional fleet action, using their pocket battleships as independent commerce raiders. Although there were a few battleship-on-battleship engagements, battleships had little impact on the destroyer and submarine Battle of the Atlantic, and aircraft carriers determined the outcome of most of the decisive fleet clashes of the Pacific War.