U.S. Marines with II Marine Expeditionary Force conduct a training press conference with Communication Strategy and Operations Marines during Marine Expeditionary Force Exercise-23, Marine Corps Base Camp Lejeune, North Carolina, Feb. 16, 2023. MEFEX is an exercise that develops command and control capabilities and warfighting functions of the MEF staff as an operational command in preparation for crisis across the spectrum of conflict. In the scenario, MEF staff developed the ability to coordinate with non-governmental organizations, U. S. Agency for International Development, and other agencies in response to a foreign humanitarian crisis. - U.S. Marines with II Marine Expeditionary Force conduct a training press conference with Communication Strategy and Operations Marines during Marine Expeditionary Force Exercise-23, Marine Corps Base Camp Lejeune, North Carolina, Feb. 16, 2023. MEFEX is an exercise that develops command and control capabilities and warfighting functions of the MEF staff as an operational command in preparation for crisis across the spectrum of conflict. In the scenario, MEF staff developed the ability to coordinate with non-governmental organizations, U. S. Agency for International Development, and other agencies in response to a foreign humanitarian crisis.