Amedal bar or medal clasp is a thin metal bar attached to the ribbon of a military decoration,civil decoration, or othermedal. It is most commonly used to indicate thecampaignoroperationthe recipient received the award for, and multiple bars on the same medal are used to indicate that the recipient has met the criteria for receiving the medal in multipletheatres. Bars are also used on long service medals to indicate the length of service rendered.