During the World War II, on April 1st 1945, the battle for Okinawa broke out because of the landing of the Japanese and the U.S. Military to the Okinawa island.
Many histories and testimonies were left by the battle for Okinawa. This shows not only the violent at the battle, but also the tragedy the general Okinawan people who got involved init.

A U.S. Military landing

Credit: Okinawa Prefectural Government

The twelve thousand of the U.S. Military and the ninety thousand of the Japanese Military died in the battle for Okinawa, but the tragedy is that more than a hundred thousand non-combatants died. Some were killed by the American bombing, but many people were killed by the Japanese Military's group suicide, spy suspicion and from hunger.
Survivor's still keeps silence. It probably means that the The Battle for Okinawa was too tragic.
What caused the tragedy? It was the Japanese military policy "To protect the mainland by the Battle for Okinawa" The Japanese Military prepared Okinawa as sacrifice they were sure to lose the War.
Let's look at the examples...