The marriage must have broken up some time in 1980.

If he had, maybe his marriage would not have broken up.

The marriage soon broke up but she didn't go home.

I was only a child when my father's second marriage broke up.

The marriage broke up in the late 1970s and she moved to London.

The marriage broke up when he moved to Canada in 1905.

Her marriage had broken up because she couldn't have a child.

In 1979, his marriage broke up, and one day three years later, the crisis came.

I think your marriage broke up because you weren't married to me.

His marriage broke up a couple of years ago and he never got over it.