I think that's a cultural thing in general, not just military. Folks change spouses like they change socks.Not related to actual combat but more to long deployments in general than a that military spouses these days are a more restless lot than in the WWII days. I’m sure being drafted vs volunteering has a little to do with it.
So when a combat vet has gone through hades and then has nothing to come back home to…..
Military life is demanding and spouses need to know what they are buying into from the start. There's civilian jobs that are very similar sans the combat.