CIMSEC – In the many discussions on the Marine Corps’ new Expeditionary Advanced Base Operations (EABO) concept, the subject of air defense seems to have largely fallen through the cracks and threatened a critical capability gap. More analysis must be focused on how these forces can be defended against various aerial threats and identify key capability gaps. By analyzing air defense across three broad categories, including advanced missiles, small drones, and traditional aircraft, EABO can be further strengthened as an operating concept.