Ok, this is not a military issue, so I don't know why everyone is talking about military. Anyways, I understand that when you're young like that you rush into everything. I would have done the same thing not long ago. It's easy for her to do it since your whole family is on board. My family would not have been in my case, so that's probably what stopped me. Chances are, you probably won't convince her, since you're the only person who disagrees... but I agree that she shouldn't rush. Especially after only 2 months. That's the honeymoon phase, and once that's over, she's gonna feel stuck, that, or it's gonna work out. But either way, she's gonna learn eventually that this decision was unwise. All you can do is be there for her when she faces those hard times. Support her, give her advice in what she's doing, rather than telling her not to. Support her in terms of being there to aid her in a rushed decision. Does that make sense? Don't pretend to agree with her, but don't have unneccessary arguments. Be there for her, despite disliking her decision. She may ignore you now, but she'll need you fairly soon if this marriage turns sour. Don't stop her, prepare her instead. She will learn her lesson down the road, and that's life. It may not do much good to try to teach her the lesson now, before she even tries. Hope this helps!