From GlobalSecurity.org,
6th Ordnance Battalion
The 6th Ordnance Battalion consisted of a Headquarters and Headquarters Detachment that exercised command and control over 5 ordnance companies located through the Republic of Korea. The Battalion had the mission of ammunition accountability, surveillance and maintenance supervision. Its subordinate units coordinated directly with the Republic of Korea Army units, who received, stored, issued and transported the ammunitions in accordance with the single ammunition logistics system-Korea. This was an international agreement established in 1974 to govern the handling and management of US titled ammunition.
The 6th Ordnance Battalion was also responsible for monitoring the Chinhae Ammunition Pier for explosive safety during off-loads. The Chinhae Ammo Pier was located on a Republic of Korea Naval Base near the quiet community of Chinhae. The 6th Ordnance Battalion, on order, also provided DS/GS ammunition support to Eighth US Army, backup GS to ROKA and common item support to USFK.
The 6th Ordnance Battalion was first constituted on 1 July 1940 in the Regular Army as the 2nd Ordnance Battalion (Maintenance). It was activated on 1 June 1941 as the 6th Ordnance Battalion (Maintenance). It was reorganized and redesignated on 23 October 1942 as 6th Ordnance Battalion and inactivated on 31 October 1945 at Ettlingen, Germany.
The unit was reactivated on 30 June 1948 at Horshing, Austria and inactivated on 17 August 1955 in Austria.
It was again reactivated on 4 May 1971 in Korea. It was redesignated on 15 December 1978 as the Korean Ammunition Management System, before being redesignated on 16 September 1984 back to the 6th Ordnance Battalion. It was relocated on 22 February 1992 from Camp Ames to Camp Carroll, Waegwan, Republic of Korea. In Korea, the 6th Ordnance Battalion was assigned to the 23rd Area Support Group.
In June 2006, the 23rd Area Support Group was inactivated as part of a larger transformation within the 19th Expeditionary Sustainment Command (previously designated as the 19th Theater Support Command. The 6th Ordnance Battalion was subsequently reassigned to the reorganized US Army Materiel Support Center - Korea.