I think those are like what they gave us when I was in basic(1976). When I was in Germany '76-80, they didn't have cigarettes anymore. I don't remember ever getting bread in them either. Sometimes they would serve them to us in the field kitchen, they would take out all the main course cans, close the boxes, and heat the main course cans in hot water. Then when you came through the line, alll the main course cans were upside doun, so you couldn't pick what you wanted. All the guys at the front of the line picked the larger cans, they had stuff like beans, spaghetti, beef(?)stew, and the ones at the end of the line got stuck with the small cans of pork or beef and grease(dog food), or even worse......the green scrambled eggs.
But when they gave out the boxes unopened, if you got one with a big can main course, then you got stuck with a small can dessert, like dry pound cake, or the worst.....fruitcake! But when they had a small main course, they usually had canned fruit for the dessert.