World War II naval operations were crucial in determining the outcome of the conflict. Major battles occurred in the Atlantic Ocean, Pacific Ocean, and Mediterranean Sea, involving powerful fleets from countries like the United States, United Kingdom, and Japan. Key strategies included aircraft carrier warfare, submarine tactics, and amphibious assaults, which played significant roles in various campaigns. Naval operations also included the use of convoys to protect merchant ships from enemy submarines. The Battle of Midway and the Battle of the Atlantic were pivotal, showcasing the importance of naval power in securing supply lines and achieving strategic dominance at sea.