 The air, or aviation, combat element (ACE) consists of a composite Marine Aircraft Group containing several helicopter, tilt rotor, tactical fixed wing, and UAV squadrons and/or detachments, as well as aviation ground support, command and control, and air defense units.The MAG is roughly equivalent in terms of numbers of aircraft and personnel to a US Army Combat Aviation Brigade.The logistics combat element (LCE) consists of a combat logistics regiment (CLR) consisting of combat logistics battalions (CLB), and specialized logistical companies and detachments to support the MAGTF.