Soldiers' records?

[Milliepede]

In the past before he married you mean? 

You haven't given his name so nobody can have a look 

[heywood]

Have you tried searching for him in records? It is not clear.

The subscription sites have some records and you could try here.
https://www.familysearch.org/search/collection/1952868

[Abhanliath]

And indeed I'm not going to give his name - bit of a sensitive subject for any living relatives. Yeah, I've found his marriage and death and lots of records of his wife, mother and children.
I might have a quick scoot around familysearch before leaving him behind.

[heywood]

Just try there and Ancestry and Find my Past to see if there is a record.

[dublin1850]

fold3 have many records of Irish men who served in the British army and elsewhere.
If you want to PM details, I will have a look for you.