Could we actually fight a war against an alien race?

[Alby_da_Wolf]

Heavenly_King said:

Alby_da_Wolf said:
About the ability to fight a long war, with even very powerful weapons, but limited resources and troops, and light years from home, just one word: logistics.

And what tells that the war will be long??? They most probably need the "click" of a trigger to make us all dissappear.

Total annihilation is a thing (but for what purpose should they travel for light years in space just to do it?), conquering a planet while leaving its ecosystem, or most of it, alive (except humans if considered really undesirable) is completely different.