Here is the answer to "Old Corps" versus "New Corps!!
Seems to work for any of the branches!!

Here is the coveted answer:

In 1775, as you all know, the Marine Corps was formed at
Tun Tavern in Philadelphia.

In the beginning they announced that any new recruit would
get a free tankard of rum.

Unfortunately, they didn't get as many recruits as they wanted,
so they announced that from now on, all recruits would get
TWO tankards of rum.

A Marine in the back ranks yelled,
"We didn't have it that good in the Old Corps!"