What constitutes being "old school" in the military?

If you have slept in a WWII vintage shelter half to deploy with and were issued the original Green Jungle boots instead of black I would call that old school. I am well familiar with both pieces of gear having been issued both.

I guess "old school", "new school" ... in my case just plain "old"...hahaha

Joined 1981 first uniform OD green

SSGT USAF 1981-1990 Wolle Erick Here is Old School Terminology that shows I am Old School Remember the old AFEES facility wgere you enlisred a Armed Forces Entrance & Examining Station now its called MEPS Military Entrance Processing Station

Cotton Duck LBE in Basic Training; M1 Steel Helmet with dual sided Grape Vine and Brown Camo and OD Cotton Fatigues; Issued Khaki Summer Uniform with Serice Cap (OD Green billed cap); Taupe Shirt and wool blend Green Class A Uniform; M16A1 with three prong open flash supressor and round forward assist, you might be Vietnam or Post Vietnam Old School.

Last experimental cycle of males and females together in basic training and really old od green fatigues that were used in Vietnam and had every uniform replaced before we finished AIT school

Those aren’t Old School. Old School was starching your cotton fatigues, spit-shining your boots with melted polish, and eating C-Rats. Beat that!

Induction center San Antonio, Texas to Fort Polk La in a DC3. WW2 T barracks, PT in fatigues and combat boots, Transport to RVN on a troop ship and unloaded down cargo net with full issue and M14 into landing craft . Put up GP medium canvas squad tents, . Drove multi fuel deuce and half and 5 ton gas. Ate C rats and smoked the included cigarettes . And that was all the fun stuff

"Old School"?
Basic Training PT in combat boots, BDUs, black web belt with a polished brass buckle. Also, Black and Yellow "U.S.ARMY" over left breast pocket and white T-shirt. Khakis (both long sleeve and short sleeve), brown overcoat and raincoat, full-color patches on all uniforms, one-piece "US" and branch insignia, qualifying with M-14. Drill Sergeant calling you a "shit-eating scumbag" just for being there in His BCT company. C-rations (Ham n' Lima Beans, pound cake, spaghetti w/meatballs, etc with 4 cigarettes). Qualify with M-14E2 and M-60 in 11B (Infantry) AIT. Five jumps out of a C-119 to earn blood wings. In Viet Nam, M151 1/4 Ton, 3/4 Ton, 2-1/2 Ton, M16A1, CAR-15, BAR, .30 Cal A6 MG. Jungle fatigues with epaulettes and exposed buttons on straight pockets and again, full-color insignia. Back in the World, Airborne Ops with C7A, C-119, C-123 and C-130. Only personnel authorized to wear a beret (green) were soldiers assigned to Special Forces.

My first uniform was OD Green