The next significant organizational change came on August 1, 1952 when a new joint headquarters, the United States European Command (USEUCOM), was activated in Frankfurt. At the same time, the EUCOM headquarters in Heidelberg was redesignated the United States Army, Europe (USAREUR). A small NATO planning cell called the CENTAG Plans Staff was also established at this time within the USAREUR headquarters staff, with the Commander in Chief, USAREUR, given the additional title of Commander, CENTAG (COMCENTAG). In April 1959, the CENTAG Plans Staff was designated Headquarters, CENTAG, and separated from the USAREUR headquarters staff. The USAREUR G3 (as the Deputy Chief of Staff, Operations, was then known) nevertheless continued to serve as the CENTAG Chief of Staff while serving as the USAREUR G3.