I don't know if Marine PT is different to Infantry PT, but aside from running, most PT I know of is high-endurance, circuit training type stuff.
A sample workout I have here is, with a 20kg bar (so an Oly Bar if it's around)
20 Push Ups
20 Sit Ups
20 Military Press
20 Upright Rows
x5. No rests.
(for some reason this one doesn't have pullups, but they usually feature, maybe that's why it's got curls instead)
Then some sort of Triathlon (Sprint distance is fine for me, but you wanna be a marine, so I suggest Full Ironman, Twice.)
There might be a different one for Lawyers, which I guess means you'll be an officer.
Open Jelly Bean Packet x 1
Eat all the good flavours (time allowed: 15 minutes)
I've got 5-day one here.
(Says nothing about Abs, I assume every day?)
All the usual exercises, Bench, Mil Press, Pulldown, Row, Curl, Dips, Flyes, Lunges, Squats.
Anyway, reps are all 3x12.