Kwajalein Atoll, Roi-Namur
http://www.fightingfourth.com/namur.htm
"The Fourth Marine Division set three new records on its first operation: It became the first division to go directly into combat from the United State; it was the first to capture Japanese mandated territory; and it secured its objective in a shorter time than that of any other important operation since the attack on Pearle Harbor. For weeks the coming battle had been known only by its code name, “Operation Flintlock.” Not until the big convoy had passed the Hawaiian Islands was its destination revealed to all hands -- the twin islands of Roi - Namur in the Kwajalein Atoll of the Marshall Islands. Simultaneously, the U.S. Army’s Seventh Infantry Division was to invade the island of Kwajalein in the same atoll."
http://www.qsl.net/v73ns/rmi.html