[harimau777]

Overall I agree. However, the difficulty that I see is when someone attacks a, sometimes nominally, military target in a situation or method where it will unreasonably injure or kill civilians. Or even when the military target is mostly an excuse to target civilians.

I think it can also get less clear when the target is an enemy's infrastructure, industry, or political infrastructure.

[ilbeeper]

If an army unreasonably kills or injure civilians it will most probably be considered a war crime. Committing war crime is not necessarily better than being a terrorist, but it's different.