Historically, a DD217 was a wallet-sized document—a certificate of service—used by the U.S. military to show a service member’s name, rank, and discharge details, which was largely phased out in the 1960s.
Knowing this will help me determine if it's related to academic work, historical records, or another topic. What is a DD217? 217.rar
However, the term likely refers to one of the following contexts based on available documentation: 1. and discharge details