World War II destroyers were fast, agile warships designed to protect larger vessels and engage enemy submarines and aircraft. They played a crucial role in naval warfare, providing escort for aircraft carriers and battleships, and conducting anti-submarine operations. These ships were equipped with torpedoes, guns, and depth charges, making them versatile in various combat situations. The design of destroyers evolved during the war, with nations like the United States, United Kingdom, and Japan producing different classes to meet their strategic needs. Notable examples include the Fletcher-class destroyers, known for their speed and firepower, which significantly contributed to Allied victories in the Pacific and Atlantic theaters.