The 28th Expeditionary Air Refueling Squadron is a provisional United States Air Force unit. It was last known to be assigned to the 40th Air Expeditionary Group. Diego Garcia Air Base, British Indian Ocean Territory. Its current status is at Al Udeid Air Base under the 379th Expeditionary Operations Group.

The United States Air Force's 40th Air Expeditionary Wing was an Air expeditionary unit located at Diego Garcia, in the Indian Ocean, from 2002 to c. 2006. The 40 AEW's mission was to support combat forces in Afghanistan and other combat areas supporting Operation Enduring Freedom. Operations began in October 2001.