Which event marked the end of World War II?

V-J Day, which stands for Victory over Japan Day, is recognized as the event that marked the end of World War II. This day commemorates the surrender of Japan, which officially occurred on September 2, 1945, when Japanese officials signed the formal instrument of surrender aboard the USS Missouri in Tokyo Bay. This surrender followed the dropping of atomic bombs on Hiroshima and Nagasaki in August 1945, which compelled Japan to capitulate, thereby bringing an end to the hostilities of World War II.

While other options represent significant historical events, they do not mark the conclusion of the war. For instance, the Korean War began years later and was unrelated to World War II's conclusion. The Battle of the Bulge was a notable battle during the conflict but occurred well before the war's end. The Signing of the Treaty of Paris pertains to different historical contexts and specifically addresses the end of the Spanish-American War, not World War II. Therefore, V-J Day is the defining moment that signifies the conclusion of World War II.