Regardless it is difficult to live with, and anyone facing a relatively young relationship with an alcoholic is well advised to RUN AWAY. Which I will continue to preach.
I know you are talking about young couples, but I wonder why your teenage daughter should have to deal with an alcoholic.
What kind of support would your daughter have when your wife is blackout drunk?
And, if she is drinking, this will happen while you are gone, and your daughter will be trapped there with her.
Okay, I am an Adult child of an Alcoholic (actually a career military man) and it still affects me today. I am 51 years old. Please consider other living arrangements for your daughter. Maybe since you are deploying you could change her to a school near her grandparents.
Please read some of the stories about ACA's, it is a hard way to live. And learn to live.
Beth