I smoked from age 16-22,quit shortly after college, got really into fitness and "healthy living"........ and then started up again when I deployed to Iraq when I was 27, in 2007

Smoking is a part of life on a deployment for an 11B in the active duty Army............ it gives you something to do, they're cheap overseas, it's a stress reliever and everyone else does it......hell my squad leader in Iraq must have smoked 5 packs a day, I never saw that guy without a cigarette, and I was at 3 packs a day most days......in a combat zone where there's the constant threat of being shot at, an IED blowing up, getting mortared, etc......, when smokes are 50 cents a pack, it seems like the natural thing to do

We would play cards for a few hours or watch movies on a DVD player, and it would be no big deal to blow through a pack in one night.
For you guys who have been out of the military for a long time, yes, in the Army pretty much everyone still smokes. I just got out about 6 months ago, and I don't think any demographic in the US has a higher "smoker percentage" than military personnel. It gave some welcome relief from the drudgery of a range, training exercise, detail, etc. to go off to the smoking area with some friends and smoke 1(or 2) cigarettes. It is true, smoking was an "accepted"' way to take a break, some E-6 or E-7 would come up and be like "When you MF's are done with those smokes go clean out that TriCon". If every hour or so you took a smoke break, it was fine, but if you took a break just to stand around, that was not acceptable.
As far as "back in the day" smoking didn't seem to be a big deal.........I grew up in the 80's and 90's, and was in college in the late 90's-early 2000's and you could still smoke in bars and restaurants. It's only been the last few years that if you still smoke you might as well be a leper.