What constitutes being "old school" in the military?

Creating two man cubicles in open squad bays with skillful arrangement of racks and wall lockers.

Serial numbers, .45s, M-14s, M-1s, SNCOs who were WWII/Korea vets, starch, spit shines, "C"-rations (ham and muthers), brasso, etc.

What a crock of crap. Old School did not have PT uniforms or M16s. Steal pot, M1 rifle, a block hat like Castro wore, C rats with small packs of cigarets and PT in boots and fatigues. No Cammo in the old school. Scrubbed all the wax off the floor (even in the little dents) during GI party, opened drains in latrines and cleaned down to the water line. Open bays with 4 bunks in a cube and the cubes seperated by a plywood moveable partition. The springs in the bunks were so weak that when you got up your back was so hunched over it took an hour to just stand up straight.

There are some excellent replies here. No need to add more of the obvious... :-)

Old school would be before the standards were lowered to allow weaker women and low T men to "meet" the standards.

While the jokes and humor of "salt dog" or "old school" are something I am more than familiar with, I am particularly interested in this area. I was called "old school" by my friends and family that came ashore at Iwo and D-Day. While all the areas aforementioned by fellow commentators on this topic do hold relevance, I would say that there is now a mentality application being attached. When I joined up the priorities went as follows, God, family, country, Corps. You never did anything to jeopardize the predecessor. Mind you that I was raised by WWII, Korea, and Vietnam Vets. It was Semper Fi not "Semper I". Today's modern forces, in my personal and professional opinion, do not look at their service as it was viewed by previous generations by majority. I have no presence of mind to call that absolute. I knew that I was guaranteed nothing and owed everything to the Service Members that paid for our freedom with blood, sweat and tears. I am somewhat concerned for an "entitled" future within the military. Again, this is only my opinion and I am smart enough to know I am far from knowing everything.

Did PT / PT test in boots and fatigues

At WWII c-rats in Basic Training

Your drill sergeants were all Vietman Combat Vets.

When you find yourself still fitting OG-108's 20 areas later..

Tent city..

Before cell phones and stress cards when mail call was where most of your communications with home happened