>>4377050ISIS was a paramilitary entity very spread afar and backed timidly by the US and Israel, in fact most arabs called it ISIS rather than ISIL because the former is its origin, Israeli Secret Intelligence Service.
Ukraine is currently still backed by NATO, not as heavily as some months ago tho, and quite concentrated in 2 to 3 fronts. If we amount all the help it has received Ukraine could've been considered the 5th strongest army in the world. It is a challenge specially when trying to minimize civilian casualties, US for instance couldn't beat a well-organized Afghan insurgency of less than 3000 people nor the Tet Offensive which was a zerg rush of less than 10k people with outdated gear.