OT - The story so far. A TW2013 adventure

[Legbreaker]

Not just what, but when and where you eat too. Smells can "float" downstream for miles over water so that curry you're munching on could well result in you copping an artillery strike....
Cooking at first and last light, or even worse at night is also a BIG no no!

Which then brings us to light discipline. Using a torch at night is likely to attract unwanted attention. Smoking at night, in addition to the smell, gives an enemy a nice glowing red aiming mark to hit. Head shot anyone?
Striking a match or using a cigarette lighter can be seen for miles in open country, and even if in the bottom of a hole in the ground, the glow can be a giveaway to an observer.

A lot of common behaviours in civilian life can so easily get you killed when there are hostiles in the area. Paranoia is the key to survival for the infantryman because they really are out to get you!