Please come back safe and sound, clean and whole.
Much military speech and language is vulgar, obscene, blasphemous and course - please don't let it rub off on you.
Some return with lifetime afflictions of loathsome diseases and maladies The government always says, "it won't hurt you."
Especially beware of radiation poisoning by association with "dirty" bombs and munitions; the results may be cumulative, undetectable, long-lasting and deadly. Do not take drugs such as uppers, downers, speed, etc. which may be addictive.
If you were good when you left, I estimate you only have a 50 percent chance of being good when you return. Many veterans return lacking in basic social skills.
It must needs be that offenses come, but woe to them by whom they come. You should not obey any wicked orders.