The greatest successes I've seen are when guys marry military shitladies. Usually the ladies get out once they finish their enlistment because of kids and PCS issues. They may or may not stay at home, but they they stay shitladies, and the house is in order. Also, a lot of people get to a point where they can't relate to civilians anymore,  so it causes a lot of friction in realationships, especially if your job is secretive.