Lt. Col. Joon H. Um, left, commanding officer, Combat Logistics Battalion 1, shakes hands with Lt. Col. Sid R. Welch, commanding officer, CLB-7, after a transfer of authority ceremony held aboard Camp Leatherneck, Helmand province, Afghanistan, Aug. 1, 2014. Combat Logistics Battalion 1 replaced CLB-7 as the last unit to aid Regional Command (Southwest) with tactical-level logistical support and will close out another chapter in Marine Corps history as the last unit to serve as the logistics combat element for RC(SW). - Lt. Col. Joon H. Um, left, commanding officer, Combat Logistics Battalion 1, shakes hands with Lt. Col. Sid R. Welch, commanding officer, CLB-7, after a transfer of authority ceremony held aboard Camp Leatherneck, Helmand province, Afghanistan, Aug. 1, 2014. Combat Logistics Battalion 1 replaced CLB-7 as the last unit to aid Regional Command (Southwest) with tactical-level logistical support and will close out another chapter in Marine Corps history as the last unit to serve as the logistics combat element for RC(SW).