My wifes grandfather left Belfast May12, 1923, just a few weeks before the civil war ended.  He had only recently returned from WW1 and was a Presbyterian as well as a mason.  We are wondering why he never spoke of his life in Ireland and why he had no desire to go back.  We have a photo of him where he was wearing a dark green military shirt with epaulets.  I am wondering if perhaps he may have belonged to the dreaded "blacks & tans".  Do any of you historians know how bad it was for a person like him in those days?  Trying to understand why he left his family never to return....
thanks