 The D-Day for Eniwetok was scheduled for 17 February 1944.Eniwetok is made up of forty islets or more and was given the operation codename, DOWNSIDE.The preliminary pre-D-Day amphibious reconnaissance was performed by both Captain Edward Katzenbach's designated 4th Marine Division's Company D (Scout), 4th Tank Battalion, and Captain James Jones's Amphibious Reconnaissance Company of the V Amphibious Corps.