Authorized by the Chief of Staff of the United States Air Force on October 12th, 1980.
Ribbon showcases thick center dark blue stripe with thin alternating white / light blue stripes leading to light blue edges.
Award Criteria (as detailed by various official sources):
The guidance for the criteria for long tour credit is in Air Force Instruction 36-2110, Personnel Assignments. You have to meet the assignment long tour criteria to be awarded the ribbon.
User Tags Detailing this Ribbon:
blue   white   usaf   cold war   modern   united states   space force