I’ll continue searching in the states
I don’t think this has been mentioned before? Could this be your John?
Civil War draft registration
John Welch, born 1827, Ireland. Farmer.
Age on 1 July 1863 - 36
Race - white
Residence - Elk, Delaware, Iowa
Congressional District 3rd. Class 2.
I wonder if there are any more detailed military records for this John?