I see lots of different series on Vet TV.
I want to watch episodes starting with whatever series were shot first.
Is there a guild for that?

That sounds like a great way to spend some time, I copied a guide below for you. Enjoy!

Kill, Die, Laugh (2017)
The Let Down (2017)
A Grunt’s Life (2017)
Department of Offense (2/21/18)
Meanwhile, in the Barracks (6/6/18)
Kill, Die, Laugh season 2 (9/9/18)
The Shop (10/31/18)
Checkpoint Charlie (1/2/19)
Drunken Debriefs (2/20/19)
Recruiters: Mission First (4/3/19)
Team BAMF (5/15/19)
Combat Sports Network (6/26/19)
The Bet (8/7/19)
Checkpoint Charlie season 2 (9/18/19)
Kill Die Laugh season 3 (11/6/19)
Meanwhile, in the Barracks (12/18/19)
Devil Docs (1/29/20)
Mandatory Fun (3/11/20)
Drone Boyz (4/8/20)
Troops Gone Wild (4/29/20)

Thank you :)