What constitutes being "old school" in the military?

Yesterday.

It is ever revolving.

To me it was just do it and shut the hell up

When you’re issued a gray, long length 6 button, waist belt raincoat that never, ever repelled rain or used a coat hanger to open the legs of an extra heavy starched pair of cotton, olive drab uniform trousers, or when using the term WAC didn’t mean whacking someone, but meant Woman’s Army Corps. That’s right boy’s and girl’s there were no co ed back then, just simple segregation. Yeah! You might be old school.

When your Sergeant assigns you to furnace detail and you’re told not to sleep, but in the morning, you’re covered from head to toe in coal, telling the Sergeant you feel asleep. Or when the Sergeant runs the platoon up the hill and back, then have you low crawl 20 yards to the mess doors. If he’s creative, has you duck walk from one end of the company street to the other. When your Sergeant is verbally eating away your sweaty little face and there’s no fawking stress card in existence to bail you out, yeah, you might be old school.

Old school, anyone in the military back in 1961-1991 that's old school military from where I stand

If the M16A1 you used in basic training was made by Mattel, you may be old school

Card Board Trucks, stove pipes for mortars and horses, welcome to the modern military.

During the fuel shortage I had to use a gamma goat for roving guard. Our PT uniform consisted of unblousing your boots, and removing your shirt and cover.

If you know how to put 16 map sheets 1/50 together into a continuous folding map book and use it.

The pickle suit and knowing what the pickle suit is.