Home Guard "Ranks"

[Baffles]

Hi everyone,
I am currently trying to trace someone who was a Captain in the Home Guard during the WW2. I am right in thinking that he would have had this rank or one below in WW1. How can I find out anything about him or his service record from WW1. Anybody out there who can help? Many Thanks
Baffles

[Peter Goodey]

You may like to read section 7 of...

http://www.nationalarchives.gov.uk/catalogue/RdLeaflet.asp?sLeafletID=147

[Baffles]

Thanks for that Peter:)