Lanefan
Victoria Rules
In war there often isn't much difference at all, particularly at the field level.Which is due to the Orcs being (baseline) evil. Orcs tend not to take prisoners, because Orcs tend to be evil. Those they do take, tend to get treated very poorly indeed (again - because evil).
Good aligned soldiers would take prisoners, and treat them with mercy, dignity and respect. Even at their own expense. Because 'good'.
I'm struggling to see the difference between your evil combatants (who pillage, kill, take no prisoners etc) and your goodly combatants (who pillage, kill and take no prisoners. etc).
Also, if the 'morally good' people end up taking a whole bunch of Orcs prisoner the next question becomes what to do with them.
Repatriating them is off the table if we don't want to be fighting them again next week or next month or whenever.
Keeping them in prison camps forever isn't a viable option, and also isn't exactly Goodly.
Enslaving them or putting them to forced work is also not exactly Goodly, though it's probably the most practical option.
Trying to assimilate them into our society, given how much they've got going against them (possible language issues, vast cultural issues and differences, generally lower intelligence, etc.) is fraught with danger, particularly if they're easily able to congregate into any large group and-or somehow arm themselves.
Giving them their own area of land big enough to support them, while certainly a Good solution, simply means we'll probably be fighting them again before long, only this time they'll be coming from two directions (their original home and their new home).
So what to do with them?