Allanea wrote:There's lots of public articles of them fleeing/surrendering/etc.
There is no shame in surrender in and of itself, unless someone follows the Japanese code of Bushido. It didn't do the Japanese any favors in the Pacific theater of WWII. The Japanese that the US did manage to take as POWs readily gave up intelligence because they were expected to die and knew they couldn't return to Japan with honor. All the Japanese lives wasted in Banzai charges just dented their morale.
If there is any chance that quarter will be given, sometimes it is better to surrender if you're out of ammunition/supplies and the battle looks hopeless. In IS' case, I'd say it would be better to not take any IS prisoners if they won't extend the same courtesy. It is better for IS to simply be annihilated. If someone is on a side about to lose against IS, it is better to keep fighting if they are going to kill you anyways.