Colonel Timothy Barrick relinquished command Friday of Marine Corps Tactics and Operations Group, or MCTOG, to Colonel Gregory Poland at the base theater aboard the Marine Corps Air-Ground Combat Center. The celebration included a ceremony to re-dedicate the streamers on the command’s colors and a reading of the White Letter which established the command 10 years ago. The event culminated with the change of command as Barrick turned over the reins to Poland.