By Sunday morning, May 30, the Battle of Attu was over except for some mop-up operations. Of the 2,650 Japanese on the island when the fighting started, only 28—none of them officers—remained alive to be taken prisoner. Five hundred and forty-nine Americans were dead. In proportion to the number of Americans engaged in the operation, it was the most costly American battle in the Pacific during the entire Second World War, save for Iwo Jima. Among the thousands of wounded and injured were numerous cases of severe frostbite, exposure, and trench foot.42
