The area in question is a hot combat zone where the Turks have engaged Syrian helicopters transgressing the border, if you want to compare it to another area then consider Eastern Ukraine - and the number of combat aircraft **** down by both sides in the last couple of years. The Russians were complacent and should have known better.
https://en.m.wikipedia.org/wiki/List...rainian_crisis
Ukrainian troops shot down one of the four attacking SU-25