Marine Corps Reference Publication (MCRP) 2-lOA.9, Air Intelligence, describes the unique aspects of intelligence support to the aviation combat element (ACE) and MAGTF relating to the enemy, weather, and terrain impacting the air domain. It includes doctrinal and scientific fundamentals, multidiscipline intelligence support to the ACE, frameworks for analyzing and understanding enemy air and air defense systems, and guidance on supporting the ACE and MAGTF commander's planning, decision-making, execution, and assessments cycle. This publication sets the foundation for training requirements, formal schools, organizational structure, and most importantly, how to provide intelligence support to the ACE and MAGTF in combat.