So let me go ahead and discuss this...
If you or your spouse decide to join the military, there is a very, very, very good chance that a deployment to a war zone is in your future. Why? Well, because we are still involved in two wars and the military's job is to defend their country. You see, it seems easy, but so often, someone gets wrapped up in "He's joining a reserve unit" or "He's got a desk job".
Guess what! If you're in the military, you're deployable! Simple. I promise it's not that hard.
The whole military family lifestyle isn't for everyone. Not at all. If you're not comfortable entering into it, don't. It won't get any better for you if you go in kicking and screaming. The only thing I beg of anyone coming into it is this: Please do not act surprised when your spouse gets called up for a deployment. Do not act as though this is shocking. Do not act as though this couldn't or shouldn't have happened.
Yeah, there is a chance that you could get lucky and your spouse will never deploy. Heck, I know a reservist that has gotten out of 3 deployments somehow, but please understand, this is NOT the norm.
All branches deploy. All jobs deploy. Nobody is immune to it, especially during a time of war.