Well, no first hand military experience, but this might get you thinking:
My best friend from college went into dental school last year.
At the end of this year, she decided she wants to try to get into the navy and let them pay for her schooling while she fixes soldier teeth on ships.
She seems VERY excited about it, but she's also going to be a non-combat officer and get to do what she calls "wussy boot camp for doctors and dentists".. And she'll have people saluting her the first day after boot camp.
A high school friend of my GF went into the marines, as a member in the military band. They then shoved him off to Iraq to be posted as a guard at various military base locations. He wasn't happy about that.
Other people I know who went into the military at various points in the past don't have much to say on the subject.
I can't imagine anything being more stressful on a marriage than either spouse, much less BOTH spouses, going into the military. I had thought about going into the air force or navy back in college, but realized that I had other priorities in life, and that wouldn't let me give 100% to the people I love. None of the people I know who served in any of the branches going in with a relationship intact were discharged with that relationship still intact.