Beside the dead bodies of Japanese soldiers killed in the Battle of Okinawa, the U.S. forces moved to occupy Zamami Island on March 27, 1945, the day after they landed. on March 26, 1945, Zamami Island, along with other islands in the Kerama archipelago, was invaded by the U.S. forces.

    With the dead bodies of Japanese soldiers killed in the Battle of Okinawa at their side, U.S. forces moved to occupy Zamami Island on March 27, 1945, the day after they landed, and on March 26, 1945, Zamami Island, along with other islands in the Kerama group, was invaded by U.S. forces. Prior to the invasion, the residents of Zamami Island were ordered to commit suicide by grenade by the Japanese military. American forces landed and invaded Zamami Island at 9:00 a.m. on the first day of the Battle of Okinawa, and from March 23, Zamami Island was destroyed by heavy aerial bombardment. Residents took refuge in self-made trenches and mountains, and on March 28, while advancing on Zamami Island, American troops discovered the bodies of 12 women strangled to death and one man buried alive in a cave. The scourge of the residents caused by the Battle of Okinawa began early.

   At 9:00 a.m. on March 26, the U.S. forces invaded Zamami Island and initially met with no resistance. Zamami Island was a hump-shaped island. The U.S. forces were forced to land on foot, with troops attached by Amtrak to a deep bay on a low plain on the southern coast. The American invasion force came under sporadic mortar and sniper fire until they reached the town of Zamami, which was located behind the beach.

 　On Zamami Island, American forces pushed into the highlands on the afternoon of March 26 without making contact with the Japanese. From midnight until dawn the next day, March 27, a group of Japanese troops armed with rifles, pistols, and sabers penetrated the American perimeter near the beach. The American forces, bearing the brunt of the attack, repulsed the localized Japanese assault with the support of automatic rifles and mortars. The American machine guns were repeatedly replaced. The night firefight evolved into a savage hand-to-hand combat in which the Americans killed more than 200 Japanese soldiers with seven killed and 12 wounded.

　The landing operations on the Kerama Archipelago began with the landing on Aka Island shortly after 8:00 a.m. on March 26, and by March 29, the entire Kerama Archipelago had fallen into the hands of American forces. The U.S. forces did not officially declare their occupation until March 31. The U.S. forces attacked the Kerama Archipelago 15 times, resulting in 31 U.S. casualties killed in action and 81 wounded. Japanese garrison casualties included 530 killed in action, 121 generals, and more than 1,195 residents taken prisoner.