Maj. Sean P. Dynan, the Operational Planning Team Leader for the Marine Expeditionary Force Exercise, explains the orientation of a map used during MEFEX 12, aboard Marine Corps Base Camp Lejeune, N.C., May 20, 2012. The MEFEX is a large scale exercise for conventional combat operations. (U.S. Marine Corps photo by Cpl. Daniel A. Wulz) - Maj. Sean P. Dynan, the Operational Planning Team Leader for the Marine Expeditionary Force Exercise, explains the orientation of a map used during MEFEX 12, aboard Marine Corps Base Camp Lejeune, N.C., May 20, 2012. The MEFEX is a large scale exercise for conventional combat operations. (U.S. Marine Corps photo by Cpl. Daniel A. Wulz)