What four islands were involved in the war?

The four islands involved in the war, specifically referring to World War II in the Pacific Theater, are Guadalcanal, Iwo Jima, Okinawa, and Saipan. Each of these islands played a significant role in strategic military operations between the Allied forces and Japan. Battles fought on these islands were pivotal in shifting the balance of power in the Pacific. The intense fighting on these islands highlighted the fierce resistance of Japanese forces and the determination of Allied troops.