The short answer: With a few exceptions, almost any award or badge that can be worn on the Army Class A "greens" may be worn on dress blues. On the Army male Dress Blue Uniform one may wear ribbons, full-sized medals, or miniature medals over the left breast pocket. However the miniature medals may only be worn with a bow tie. Special skill (such as airborne wings) and marksmanship badges are also worn on the left side above or below ribbons, though when wearing fullsize medals on dress blues drivers and mechanics badges may not be worn nor may any special skills badges or marksman ship badges be worn beneath full-size medals on the pocket flap of Army male dress blues. For the full answer see Army Regulation 670-1 for wear of uniforms Chapter 20 is male dress blue uniform and chapter 21 is for females. AR 670-1 is available as PDF here: www.army.mil/usapa/epubs/pdf/r670_1.pdf also as HTML here: http://www.marlowwhite.com/army-AR-670-1-view.html
Dress blues and dress greens are set up the same way, so any unit award you have that can be worn on your greens can also be worn on your blues.
do you wear unit awards on the dress blues for a military ball
Army Meritorious Unit Citation (2 Oak Leaf Clusters), and Army Superior Unit Award.
This may sound confusing- I hope I explain in such a way it can be understood. Unit awards (Presidential Unit Citations, i.e.) are not personal decorations- they are awarded to members of an entire unit on a single date. If you were a member of the unit when it was awarded, you can wear it forever, regardless of where your military career sends you. If you became a member of that unit AFTER the Citation was awarded, you can wear it while you are a member of that unit, but upon transfer, you are no longer authorized to wear it on your uniform.
The unit crest is worn on the epalette of the dress green uniform,all nco's wear a green cloth secured to the epalette and the unit crest is placed upon the same...
https://www.hrc.army.mil/site/active/tagd/awards/Unit_Awards/unit_awards.htm This the HRC website for listing of Unit Awards
Dress blues are typically worn by military personnel during formal events and ceremonies throughout the year. The specific occasions and frequency may vary depending on the branch of service and individual unit.
You wear the unit's awards; however, if you were a part of unit at the time it earned a unit award, those awards carry over with you.
Unit Awards have been listed up to 1962 here: http://www.apd.army.mil/pdffiles/p672_1.pdf and 1962-1988 here: http://www.apd.army.mil/pdffiles/p672_3.pdf Since the last register was published in 1988, you must refer to the Department of Army General Orders (DAGO) located on the Army Publishing Directorates (APD) website for awards after the period. http://www.usapa.army.mil/. If you do a search for "DAGO," all the DAGOs will appear for review. Any DAGO with the title equivalent to "AWARDS" should be reviewed.
Servicemembers are honored usually during an awards ceremony. The higher the award, the more pomp and ceremony. It not only awards the soldier for individual accomplishment, but brings prestige to the unit as a whole.
Navy Meritorious Unit Commendations do follow you to other branches. They are considered permanent awards from all branches, except the Army. Unit Commendations from the Army may not follow you to other branches, or even other units. As long as you were serving in the unit when the commendation was earned, it is a permanent award that you can wear on your uniform regardless of service. Otherwise, the wear of any unit award is only worn when you are actually assigned to that unit (temporary award).
You have to wear all of your permanent awards. The only thing that you do wear and is not permanent is the unit crests. You also wear the unit awards if you belonged to that unit when the award was received.
Personal awards, Unit awards, and Service awards.