Throughout the day, the Marines methodically dynamited the caves, destroying most of them by 21:00. The few surviving Japanese conducted isolated attacks throughout the night, with hand to hand engagements occurring. By noon on 9August, all Japanese resistance on Tanambogo ended. In the battle for Gavutu and Tanambogo, 476 Japanese defenders and 70 U.S. Marines or naval personnel died. Of the 20 Japanese prisoners taken during the battle, most were not actually Japanese combatants but Korean laborers belonging to the Japanese construction unit. The poem, Graves of Gavutu, written by Frank W. McCullock, memorializes the Marines battle for Gavutu and is part of the Hell Hawk Poems collection.