The 820th Bombardment Squadron is a former Army Air Forces unit, inactivated on 4 January 1946. The squadron was first activated during World War II as the 521st Bombardment Squadron. The squadron was soon engaged in the antisubmarine campaign off the Atlantic coast of the United States as the 16th Antisubmarine Squadron.

Charleston Air Force Base is a United States military facility located in the City of North Charleston, South Carolina. The facility is under the jurisdiction of the United States Air Force's 628th Air Base Wing, a subordinate element of the Air Mobility Command (AMC). It is part of Joint Base Charleston, which combined Charleston Air Force Base with Naval Support Activity Charleston.