Oak leaf cluster
|Oak Leaf Cluster|
Bronze and Silver Oak Leaf Clusters
|Awarded by United States|
|Awarded for||Worn to denote subsequent decorations and awards.|
|Status||Currently in use|
An oak leaf cluster is a miniature metal device worn by members of the seven uniformed services of the United States on medals and ribbons issued by the United States Army, Air Force, and Department of Defense to denote subsequent decorations and awards. They are bronze or silver in appearance, formed as a twig of four oak leaves with three acorns on the stem. Each bronze oak leaf cluster represents one additional award, while a silver oak leaf cluster is worn in lieu of five bronze oak leaf clusters.
Wear and examples 
Oak leaf clusters are worn with the stems of the leaves pointing to the wearer’s right. For medals, 13/32 inch oak leaf clusters are worn on the medal's suspension ribbon. If four oak leaf clusters are worn on the suspension ribbon, the fourth is placed above the middle one in the row of three. For service ribbons, 5/16 inch oak leaf clusters are worn, with no more than four oak leaf clusters being worn side-by-side. If the number of authorized oak leaf clusters exceeds four, a second ribbon is authorized for wear and is worn after the first ribbon. The second ribbon counts as one additional award, after which more leaf clusters may be added to the second ribbon. If future awards reduce the number of oak leaf clusters worn on the first ribbon due to bronze oak leaf clusters being replaced by a silver oak leaf cluster, the second ribbon is removed and the appropriate number of devices is placed on the first ribbon. The sequence of bronze and silver oak leaf clusters for the first through twenty-first awards of an Army Commendation Medal would be as follows:
Decorations and awards 
When authorized, oak leaf clusters may be worn on United States Army, Air Force, and Department of Defense decorations and awards issued to the following seven uniformed services: the United States Army, Navy, Air Force, Marine Corps, Coast Guard, Public Health Service, and the National Oceanic and Atmospheric Administration.
|Army personnel||Air Force personnel||Navy, Marines, Coast Guard, PHS, and NOAA personnel|
|Defense Distinguished Service Medal||Defense Distinguished Service Medal||Defense Distinguished Service Medal|
|Distinguished Service Cross and Air Force Cross||Distinguished Service Cross and Air Force Cross||Distinguished Service Cross and Air Force Cross|
|Distinguished Service Medal and Air Force Distinguished Service Medal||Distinguished Service Medal and Air Force Distinguished Service Medal||Distinguished Service Medal and Air Force Distinguished Service Medal|
|Silver Star||Silver Star|
|Defense Superior Service Medal||Defense Superior Service Medal||Defense Superior Service Medal|
|Legion of Merit||Legion of Merit|
|Distinguished Flying Cross||Distinguished Flying Cross|
|Soldier's Medal and Airman's Medal||Soldier's Medal and Airman's Medal||Soldier's Medal and Airman's Medal|
|Bronze Star Medal||Bronze Star Medal|
|Purple Heart||Purple Heart|
|Defense Meritorious Service Medal||Defense Meritorious Service Medal||Defense Meritorious Service Medal|
|Meritorious Service Medal||Meritorious Service Medal|
|Aerial Achievement Medal|
|Joint Service Commendation Medal||Joint Service Commendation Medal||Joint Service Commendation Medal|
|Army and Air Force Commendation Medal||Army and Air Force Commendation Medal||Army and Air Force Commendation Medal|
|Joint Service Achievement Medal||Joint Service Achievement Medal||Joint Service Achievement Medal|
|Army and Air Force Achievement Medal||Army and Air Force Achievement Medal||Army and Air Force Achievement Medal|
|Army Reserve Components Achievement Medal||Air Force Good Conduct Medal|
|Air Force Longevity Service Award|
|Overseas Service Ribbon (long and short tours)|
|Presidential Unit Citation||Presidential Unit Citation|
|Joint Meritorious Unit Award||Joint Meritorious Unit Award||Joint Meritorious Unit Award|
|Valorous Unit Award||Gallant Unit Citation|
|Meritorious Unit Commendation||Meritorious Unit Award|
|Superior Unit Award||Outstanding Unit Award|
|Organizational Excellence Award|
|Air Force NCO PME Graduate Ribbon|
|Air Force Training Ribbon|
Except for the Air Medal, unique decorations issued by the Army or Air Force, and those decorations and awards issued by the Department of Defense, the other uniformed services use 5/16 inch stars to indicate subsequent awards. A gold 5/16 inch star is equivalent to a bronze oak leaf cluster, while a silver 5/16 inch star is equivalent to a silver oak leaf cluster. While the Air Force uses oak leaf clusters for the Air Medal, since the Vietnam War the Army has used 3/16 inch bronze Arabic numerals to denote subsequent awards, in which case the ribbon denotes the first award and numerals starting with the numeral "2" denote additional awards.
Other nations 
In other nations, oak leaf clusters are also used as symbols for various awards and decorations. In Germany, the German oak is the national tree of Germany, thus oak leaves are a prominent symbol on most German military orders. During World War II, the Knight's Cross of the German Iron Cross could be awarded with the additional distinction of oak leaves (mit Eichenlaub). Of the 7,313 awards of the Knight's Cross, only 882 received oak leaves. After World War II, Iron Crosses awarded previously could be worn by the recipient if the swastika was replaced by oak leaves. The Bundeswehr awards the Cross of Honour for Bravery for extraordinary bravery. The Cross of Honour for Bravery differs from the Badge of Honour by an adornment in the shape of stylized double oak leaves. Furthermore, it was featured on the Pfennig in Germany and since the introduction of the euro in 2001 it is used on the obverse side of the German euro coinage. In earlier times, the Pour le Mérite, the highest military order in the Kingdom of Prussia, could also be awarded with oak leaves. A civil version of the order, for accomplishments in the arts and sciences, still exists in the Federal Republic of Germany.
In Commonwealth countries, a bronze oak leaf signifies a Mention in Despatches, and is worn as a gallantry award in its own right, rather than to signify multiple instances of campaign service. The Commonwealth equivalent of a United States oak leaf cluster is a medal bar worn with a campaign medal.
See also 
- Awards and decorations of the United States military
- United States military award devices
- 5/16 inch star
- Service star
- Campaign star
- Battle star
- DoD Awards Manual, 1348.33 V3
- DoD Awards Manual 1348.33, V3, P. 16 (2) bottom, Nov. 23, 2010
- Army Regulation 670-1
- "DoDM 1348.33-V3, November 23, 2010". Retrieved 18 April 2012.
- Army Regulation 600-8-22
- Air Force Instruction 36-2803
- Coast Guard Commandant Instruction 1650.25D
- "Commissioned Corps Instruction CC26.3.3 Wear of Ribbons and Medals" (pdf). Commissioned Corps Management Information System website. United States Public Health Service. 28 August 2008. p. 12. Retrieved 1 July 2012.
- "NOAA Corps Directives, Chapter 12 PART 6 - Insignia, Medals, and Ribbon Bars". Commissioned Corps Personnel Center. Retrieved 1 July 2012.
- DoD Awards Manual 1348.33, V3, P. 50 "AM" (P. 51 Table 1, Key 1., 2., 11., 13.), November 23, 2010
- DoD Awards Manual, V3, P. 55&56 (1), (2), November 23, 2010
- "Stiftungserlass des BMVg vom 13. August 2008" (in (German)). Bundeswehr.de. Retrieved 2011-10-26.