U.S. Army Medical Department Activity Japan conducted a change of command ceremony where Col. Vivian Hutson relinquished command to Col Thirsa Martinez during an outdoor ceremony at Yano Field, Camp Zama, Japan on June 17, 2014. Brig. Gen. Dennis Doyle, Commanding General of Pacific Regional Medical Command and Tripler Army Medical Center hosted the event attended by top U.S. Army leaders based in Japan and other local civilian dignitaries.