 Complete the following phrase:  The regiment then returned to New Zealand to refit for the upcoming Operation Galvanic, the capture of the Gilbert Islands in the Central Pacific. This time the target was Tarawa Atoll. The 6th Marines, once again part of the 2nd Marine Division, was the V Amphibious Corps floating reserve. The assault waves stormed ashore on 20 November 1943 but ran into stiff resistance. Casualties were so heavy that the entire division reserve was committed on the first day. The 6th Marines was ordered ashore the following morning. The 1st and 3rd Battalions landed across Betios Green Beach and were ordered to drive the length of the island, the 2nd Battalion was used as a blocking force on nearby Bairiki Island. Betio was declared secure after 76 bloody hours. The 1st and 3rd Battalions mounted out for a new rest camp in Hawaii, but the 2nd Battalion stayed on to clear the rest of the atoll. The 6th Marines suffered 355 casualties 99 dead, 256 wounded and received a Presidential Unit Citation for actions at 