I do not know whether he was discharged from his regiment where he was attached to the Worcesters in gallipoli or if it was a different one.
I'm assuming the expedition he was involved in was the allied intervention in the russian civil war
The wikipedia entry mentions these regiments from the British army as being involved:
But it is probably incomplete and lacks detail.
So I think firstly, I'm after a list of regiments which were involved
Next, looking for the detail of the British Force's involvement in the expedition, as having read the wikipedia entry i'm still not entirely clear what the expedition was all about as it seems there were numerous purposes.
And then finally, if anyone has any pointers on how I would best find out whether he did indeed serve in this expedition, which regiment, and where he would've served.
This last part is not as easy as the world wars as it wasn't a war in itself and imagine there weren't medals awarded for this expedition in itself.
Anyway, hope someone here can help out