On July 26, 1944, during the Battle of Guam in the Pacific War, approximately 2,500 Japanese soldiers were wiped out and killed in the carnage of American forces on the Orote Peninsula, and the bodies of hundreds of Japanese soldiers were scattered.

     On July 26, 1944, during the Battle of Guam in the Pacific War, approximately 2,500 Japanese soldiers were killed in action when they were wiped out in a killing spree by American forces on the Orote Peninsula. The bodies of hundreds of Japanese soldiers were scattered on the Orote Peninsula. The Japanese soldiers' contribution to the defense of Guam ended when they delayed the linking of two American landing parties and the opening of Apra Harbor for several days. The U.S. casualties to the Marines were approximately 153 dead and missing. The Battle of Guam broke out with the American landing on July 21 and ended on August 10. About 18,500 Japanese troops were killed in action and about 1,250 prisoners of war were captured. The U.S. forces lost approximately 2,124 killed in action and 5,676 wounded.

   On July 21, U.S. forces landed on both sides of the Orote Peninsula west of Guam to secure Apra Harbor. After heavy fighting, U.S. forces declared the Orote Peninsula under control on July 29, 1944. An estimated 3,000 Japanese soldiers were killed defending the Orote Peninsula. All Japanese soldiers were literally wiped out in a fierce flesh attack. The American forces suffered many casualties on the beaches where they landed. The U.S. forces had a difficult time capturing the Vertical Depth Camp, and the Japanese forces' stubborn resistance, which had the advantage of the terrain, led to a continuous back-and-forth offensive and defense. The Japanese forces launched a sortie from the Rikuchu position and repeatedly attacked the U.S. Marines in heavy night raids.

　On July 21, the U.S. forces began landing on Guam. In the Guam offensive, the American forces overwhelmingly outnumbered the Japanese. In the first day and night of fighting, the Japanese lost more than half of their soldiers, and on July 25, the Japanese forces burned their regimental flags and launched a night assault banzai attack on the American positions on the night of July 25. The Japanese soldiers suffered heavy casualties and finally lost their ability to fight, and on the night of July 30, they made a final banzai charge, crushed to pieces, and were annihilated.

     The U.S. Army's control of the Orote Peninsula resulted in the loss of about 95% of the approximately 3,500 Japanese troops. The number of U.S. Marine casualties is   unknown, but it was estimated at 200 to 300 dead and hundreds wounded. The Japanese fought a defensive battle while being pushed to the north. Attempts to withdraw Japanese forces from the Orote Peninsula were unsuccessful. Those who survived were trapped on the Orote Peninsula, and were in a desperate situation.