On 20 March units of the 4th Marine Regiment, transported by "President Hayes", peacefully occupied Emirau Island. In April and May she transported Army replacements for the Marines on New Britain. On 4 June she sailed, with units of the 3rd Marine Division embarked, for the Marshall Islands to stage for the assault on Guam. Enemy resistance during the Saipan operation delayed sailing, but on 21 July she landed her troops and supplies east of Apra Harbor.