Millicoma refueled ships off the Marshall Islands prior to and during the invasion; thence, arriving Majuro on 4 February, she served as station oiler in the Marshalls until sailing for the New Hebrides on 2 March.
Millicoma served out of Ulithi during the remainder of World War II as she continued a busy pace of fleet replenishment operations which carried her to the heart of the Japanese Empire.