Gentlemen,
My apologies, I confused the “Army Service Ribbon” with the older “National Defense Service Medal.”
Here are the conditions and history of the Army Service Ribbon (ASR): https://en.wikipedia.org/wiki/Army_Service_Ribbon
And here is a Department of Defense press release from 2002 giving the requirement to be awarded the National Defense Service Medal (NSDM) and earlier periods of service during which it was awarded to serving members of the US armed forces:
https://archive.defense.gov/news/newsarticle.aspx?id=44101
At some point I would have added it to my bar of ribbons, but the first one on the bottom left, for me, is the NSDM, followed by the ASR, & etc.
Gotcha.
I got handed a NDSM when I got back from Desert Storm, along with a couple other “I was theres”.