Hiya Noel,
the problem that you MIGHT be up against is the time frame
James may not have been in the army for long -
most of the online military records are 1914 - 1920
Then there is the 1922 military census
So, it's possible that James military time 'fell' between these two points where most of the records are.
Do you have his marriage cert to get his father's name and occupation ?
Are you trying to work out his family tree or just his military records ?
Tara