I think it should not be considered terrorism to the extent that the attack targeted legitimate military targets during a time of war — broadly speaking, combatants and other parts of the organization that affect its ability to wage war. Terrorism, at least least in my view, is an attack that either intentionally targets civilians or is truly indiscriminate, and is aimed at producing political cha age by causing fear.
By those definitions, I think this is clearly not terrorism. (Though we might learn more information about who was targeted that could change this assessment.) Admittedly, my definitions only imperfectly track the way the word is used in the west, but I think that's only due to frequent misuse of the term for political ends.
I would worry about a definition of terrorism that creates an incentive to avoid this type of warfare in favor of dropping bombs.
By those definitions, I think this is clearly not terrorism. (Though we might learn more information about who was targeted that could change this assessment.) Admittedly, my definitions only imperfectly track the way the word is used in the west, but I think that's only due to frequent misuse of the term for political ends.
I would worry about a definition of terrorism that creates an incentive to avoid this type of warfare in favor of dropping bombs.