 Complete the following phrase:  Sigourney then made escort trips between Guadalcanal, Cape Gloucester, Purvis Bay, Majuro, Eniwetok and Kwajalein. On 11 May, the destroyer sortied from Kwajalein with Task Group 51.18 TG 51.18, the Joint Expeditionary Force, Reserve, for the amphibious assault on Saipan and Tinian in the Mariana Islands. Sigourney arrived off Saipan, on 16 June, and participated in operations there and 