The 455th Expeditionary Medical Support Squadron is a United States Air Force unit responsible for providing medical support during military operations. As an expeditionary squadron, it can be rapidly deployed worldwide to deliver a full range of medical capabilities, including surgical services, critical care, and emergency care. Its mission is essential in ensuring the readiness and well-being of U.S. forces and supporting coalition partners in contingency and combat environments. The squadron operates under the Air Combat Command, with its primary base of operations at Joint Base San Antonio, Texas.