What constitutes being "old school" in the military?

Driving a Jeep
Wearing OD green
Eating C rations
Cursing as part of cadence
No polically correct cadences

The downside of Old School:
1.Can't type/Can't spell when he tries to type. Also not aware that grammatical rules exist. Example: NCOER bullet as follows "He be a good NCO wit his hairs cuts at mourning fornication"
(everyone in this group needs Grammarly)
2. Operating a DAGR/FBCB2 is tantamount to witchcraft.
3. Has no campaign ribbons but talks about the FTX near the Fulda Gap or REFORGER/Team Spirit 86 as if he landed at Normandy. (Spent 20 years in, never deployed outside CONUS but tells you that the EIB he got in 88 is higher than your CAB from Kunar in 09 because it is a better measure of a warrior) True story.
4. Thinks that all that NBC training the 80s (CBRN) would have kept him alive. (doesn't know how radiation or VX nerve agent affects you on the cellular level)
5. Is on wife number seven but thinks that how late you stay in the company area has a correlation to productivity and quality of an NCO.
6. Thinks that sick call is for pussies, hasn't documented a single service-related injury or condition and can't figure out why the VA gave him a 0% after he got out.
7. Made SFC/E7 as an 11B got out with zero college credits and wanders around his job at Walmart calling the 19-year-olds he works with POGS and would smoke the shit out of them if he was still in.
8. Has to sound out the "big words" when reading a slide during a brief but thinks PT score is the measure of a leader.
9. Cusses out everyone for everything and can't figure out why retention is at 0%. (future Walmart employee)
10. Spends the 80s & 90s telling everyone how he is a hard charger- life taker and combat leader- drops retirement packet the week after 9-11 because "wanted to fight the Russians and isn't getting smallpox/anthrax shot" (true story)

If you wore heavily starched sateens, ate C-rations, and fired a .45 for qualification, you're "old school".

well i know many are more old school then me, but basic was in ft Jackson sc, old ww2 barracks, ait ft Polk la,ww2 barracks, then off to FT Campbell KY, newer buildings, c rations packed in 1940s, ran pt full uniforms and boots. was 11c use to do calculations on a board, now a days they have GPS and lazors to pinpoint targets, lol not a bad thing..used m16 basic rifle, used m14 sniper rifle,also air assault school..just saying in time things get better, once a soldier always a soldier

Two things, set me apart as an old school Sgt... (added to all that the major said with the exception of the Gamma Goat) as it was really an Marine thing? Not too many overseas in Germany... But most of us who were in the Army were Draftees, ( noted in our 2-1 as US not RA) during the Vietnam Era, had an M14 to Qualify with in Basic, we wore kakis in summer, and green in winter.... we had the old solid Green Class A’s loved that C -cap..../ and our Duty Uniforms were also solid OD green, - or like I said loved Kacki’s brown ( for summer). We even had pockets in pants (like real pants). And then in September 1973, things changed, most of us in the Army prior only knew an all male Army... all that changed as the Army became one and we always made jokes about the “WAC’s,!”
But soon changed as well.

US Navy Deep sea diver "old school." 190 lbs of gear.

Navy Deepsea diver "old school."

First and foremost I am a non combat Veteran. I served from 86 to 91 in the USN as a Dental Tech which I loved the Med and Dental field. My ship the USS Austin LPD 4 went to the Gulf at the end of January 91. I was Honorably discharged on 7/1/91. However, in the USN we wore the docker boots and Dungarees. And at that time it was considered the new Navy. So yes, I do consider myself old school military.

The black boot Army
Beepers
Starched BDUs
No sensitivity training (WTF is that shit?)

Firing "RIFLE GRENADES' with the best rifle a grunt ever had, the M1!