I don't understand the decision here. He served well for his time. I heard him interviewed this morning and he went guilty and was up before his CO because he wanted it out of the way. The guy in the fight lost a filling. I don't condone the fighting but it's one offence and a reasonably minor one, I think his service offsets it/
It does sound at the time as if he as having issues with alcohol but he served for 13 years, he has a wife and family here, it seems ridiculous to deport him and not to let him stay.
I do believe this should be a case by case decision and not everyone should get a free pass no matter what they have done but surely we can't just throw people out who have served well in numerous conflict zones for all that time because of one disciplinary offence (in which he waived his legal counsel and seems to have thought it would be over if he paid the fine which, as it was military, was much more tha he would have paid as a civvie).
I think this is rather shaming.