How Long Ago Was End of World War II?

World War II — the deadliest conflict in human history — came to a formal close on September 2, 1945, when Japanese representatives signed surrender documents aboard the battleship USS Missouri in Tokyo Bay. The ceremony, presided over by General Douglas MacArthur, lasted 23 minutes and brought to an end six years of global warfare that had claimed an estimated 70 to 85 million lives.

The war in Europe had ended months earlier on May 8, 1945 (V-E Day) with Germany's unconditional surrender. The Pacific theater continued until two atomic bombs were dropped on Hiroshima (August 6) and Nagasaki (August 9), prompting Emperor Hirohito to announce Japan's surrender on August 15 — now celebrated as V-J Day.

The war's aftermath reshaped the entire world order: the United Nations was founded, the Cold War began, decolonization accelerated across Asia and Africa, and the Nuremberg Trials established the principle of international war crimes accountability. The Marshall Plan rebuilt Western Europe. The devastation was so complete that nations created new international institutions specifically to prevent another such catastrophe — a framework that, imperfect as it is, continues to shape global governance today.