Combat mission : Expanding the Marine Corps ; Further growth of the FMF ; A new division ; Fleet Marine Force, Pacific -- Unit organization : Unit designation practices ; 1943-44 divisional organization ; The infantry regiment ; The artillery regiment ; Engineer regiments ; Speicial troops ; Service troops ; Separate infantry regiment organization ; Splitting the defense battalions ; Amphibian units ; Amphibious corps organization ; Task organization for combat -- Tactics : Amphibious assault ; Clearing the island ; Fire support -- Weapons and equipment : Individual weapons ; Crew-served infantry weapons ; Artillery ; Tanks -- Command, control, communications, and intelligence : Command and control ; Communications ; Intelligence -- Combat operations : Unit status ; Tarawa ; New Britain ; Roi-Namur ; Eniwetok ; Saipan ; Tinian -- Lessons learned -- Chronology