The Outstanding Unit Award is a decoration of the United States Air Force which was first created in 1954. The decoration is awarded as a ribbon to any command of the U.S. Air Force (including Reserve and Air National Guard) which performs exceptionally meritorious service, accomplishes specific acts of outstanding achievement, excels in combat operations against an armed enemy of the United States, or conducts with distinction military operations involving conflict with, or exposure to, a hostile action by any opposing foreign force. This is a slide on ribbon.