The Mobility Equipment Center (MEC), predecessor of the U.S. Army Mobility Equipment Command (MECOM), was established in St. Louis in 1964 as a center under the Mobility Command, Warren, Michigan. The parent organization, the Army Engineer Supply Control Office (ESCO), was re-designated the U.S. Army Mobility Equipment Center, 1 February 1964. In March and April 1964, the functions and many of the personnel of the Mobility Support Center had been recently transferred to MEC. The Mobility Support Center had been recently created by a merging of the Engineer Maintenance Center (EMC) and the Quartermaster Equipment and Parts Commodity Center (QMEPCC). In May 1964, surface equipment (rail) was transferred from AVSCOM to MEC, and in October, amphibian and marine equipment were transferred.