My parents were married until the day my dad died, which was after their forty fifth anniversary. However, my sister has been married twice and my brother has been married three times.
I also know several people in the military community that are divorced or getting divorced, sometimes the lifestyle is just too hard on a family. I have been married to my husband over 13 years. But I would never judge someone for deciding to end their marriage. Things happen, as long as you try to work it out, if you are just happier apart, why stay together?