Japan, Okinawa Prefecture, Fengjian City, Old Naval Command trench World War II, the U.S. Army logged on in Okinawa, where the Japanese army set up strategic defense lines against the U.S. Army, low tunnel people can not stand upright, dim light, because now the exhaust facilities are complete, also often clean, the smell is also passable, war tunnel odor is also very bad, now here has become a day. This child's patriotic education base has been visited by Japanese pupils all the year round. Japanese children visit it seriously. They record what they see and hear with a question board. Their handwriting is correct. The trench is located on the top of a hill. It takes some physical energy to walk up. Mobile phone shows that it is equivalent to climbing the 17th floor. On the top of the hill, you can see the comfort tower, in the tunnel, the communication room and the commander's office. The power room, the medical room, the junior soldier room and other rooms, and the weedy tunnel outlet are very concealed on the outside. The Japanese attacked the U.S. Army from the outlet. In the Okinawa campaign, the U.S. Army paid a painful price. Although the whole army of the 64th Division of the Japanese Army was overwhelmed, the U.S. Army also casualties more than 50,000 people. There was a wall in the tunnel that was filled with bullet holes left by grenade explosion. The Japanese Commander committed suicide here. Peace is so precious.