I was in one of those "post war armies securing Europe from the reds" for a total of six years-- first in the 70's, and again in the 90's, and never saw a pizza box in the field. I saw lots of troops (including me) eating them in restaurants, or in the PX, but never in the box in the field. Please tell me if things have changed that much. We even had pizza occasionally in the mess (dinning facility now--and it was in a rectangular strip), but it never came in a box. I still think it would be interesting to see a dio of the delivery truck, with a mishap with an armored vehicle. Or perhaps as you say, a tank crew leaning over the side buying a Pizza on the sly from a delivery driver in some German town somewhere (I bought plenty of bratwurst, pomme frittes and Spezi that way-- and Moon Pies in Korea!).
VR, Russ