Service medal

A service medal is an award to individuals who participated in designated wars, campaigns, or expeditions, or who have fulfilled specific service requirements in a creditable manner. Service medals are sometimes also Campaign medals.
Examples of service medals.
United States.
Two of the service medals currently issued by the United States Armed Forces are the National Defense Service Medal and the Global War on Terrorism Service Medal. The National Defense Service Medal is normally issued to anyone who was called to active service during specific time periods. The Global War on Terrorism Service Medal is awarded to any active duty member of the United States military providing support for anti-terrorism operations for 30 consecutive or 60 non-consecutive days unless killed or wounded in the line of duty. The term "support" is interpreted very broadly.