This thesis provides a look at the issue of airbase opening operations in the post 11 September environment of Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF). During the Global War on Terrorism, the need to establish and operate joint airbases has never been greater. The Air Force Institute of National Security Studies identified the topic as a priority one topic for fiscal year 2006. The problem was whether the doctrine airbase opening doctrine in effect during OEF and initial OIF operations were comprehensive to ensure successful future joint operations. To address the problem the thesis analyzes base operating support, airfield operations, airbase ground defense, and communications utilizing doctrine and case study information. Joint doctrine provided little guidance regarding joint airbase opening operations. This can cause a number of problems regarding joint airbase operations command and control, facility utilization, and airfield transition to civilian use. The thesis provides a detailed look at twenty-two joint doctrine publications that include provisions relevant to airfield operations. It provides a thorough case study of OEF and OIF airbase opening operations. The combination of the case study and doctrine analysis provide the justification that there needs to be new doctrine on joint airbase operations.