Dog tag

A dog tag is a small flat metal tag worn on chains or collars around the neck by dogs so that their owners can be notified if they are lost.

A dog tag is also an identification tag worn by military personnel in the United States. The name, military id number, blood type?, Religion and (maybe only WW2, Date of last Tetanus shot e.g. T-08/40) and ??? are stamped on a small piece of metal that is worn on a metal chain and strung around the neck. It helps identify the wounded and dead. Dog tags were worn at least as far back as ancient Sparta?.