All 5 were Union Veterans, all from Ohio and all 5 served as President of the United States.
sorry typo in the title was my fault
Edit - I am not a fan of "What do ... have in common" type questions, because, as this thread shows, there are probably going to be a great many things that the people had in common in addition to the things the author of the question was thinking about. This makes a lot of work for me, since I have to check out all the alternative answers and try to decide if they are correct.
If anyone's thinking about asking this type of question in the future, I would ask that you please try to word your question so that the players don't have quite so many possible alternative answers.
hoosier