405th

405th may refer to:

405th Air Expeditionary Group, the flying component of the 405th Air Expeditionary Wing 405th Air Expeditionary Wing, provisional United States Air Force unit assigned to Air Combat Command 405th Tactical Missile Squadron ("Green Dragons"), an inactive United States Air Force unit

See also 405 (number) 405 (disambiguation) 405, the year 405 (CDV) of the Julian calendar 405 BC