 They were part of the 14th Marine Regiment and the 4th Marine Division.Provide artillery support to a maneuver element or reinforcing fires to another artillery organization.4th Battalion, 14th Marines started as a direct support artillery Battalion utilizing the M109A3 (SP) Self Propelled Howitzer, then transferred all (18) M109A3 SP's to the Army and converted to the M198 Tow Howitzer.