The decisive victory in World War II that became a major point in the Pacific Theater was the Battle of Midway, fought in June 1942. This naval battle marked a turning point in the war against Japan, as American forces successfully repelled a Japanese attack, sinking four aircraft carriers. The victory not only shifted the balance of power in the Pacific but also bolstered American morale. Midway paved the way for future offensives and demonstrated the effectiveness of American military strategy. It ultimately laid the groundwork for the liberation of occupied territories in the Pacific.