US Campaign Ribbons

[MacMillan of Rathdown]

That's where you get into the technicalities of definition. All ribbons are a decoration of some sort, but not all ribbons are representative of medals. So, by strictest definition, a ribbon is not a medal and should not be worn on civilian clothes.

Yes, I know many people do it, but it's not within the reg.

Absolutely correct!

Just to demystify things a bit, decorations are technically medals awarded for valor-- bronze star, etc. Most medals are awarded for achievement or proficiency. Ribbons, which do not have medals, are usually training awards.