Silu and besbrian:
Thank you both for your responses. Information is always handy.
However,

I think I phrased the question wrong. I wasn't refering so much to enemy counter attack as I was to the citizens of a given city propper. I was looking towards trying to get them "settled down" quicker after an occupation and to keep them from revolting after that (Which is why I mentioned size and culture).
I find myself leaving those fast mobil units I mentioned guarding a city while the infantry (Archers, MGs... whoever) come slogging up behind. Maybe a better question then would be, can you leave a recently occupied city empty of troops for a few turns until the garison gets there? Again, citizens as opposed to counter attack.
F