World War II naval warfare involved significant battles fought at sea, primarily between the Allied Powers and the Axis Powers. Key naval battles included the Battle of Midway and the Battle of the Atlantic, where aircraft carriers and submarines played crucial roles. Naval technology advanced rapidly during this period, with innovations such as radar and improved ship designs. The use of aircraft in naval operations transformed strategies, leading to the development of carrier-based warfare. Overall, naval engagements were vital in securing supply lines and establishing dominance over the oceans.