Starting war (actual military aggression), no - reacting to it having been started by someone else is a different thing (very little if any choice available).
then again
"“War, Nobby. Huh! What is it good for?" he said.
"Dunno, Sarge. Freeing slaves, maybe?"
"Absol—well, okay."
"Defending yourself against a totalitarian aggressor?"
"All right, I'll grant you that, but—"
"Saving civilization from a horde of—"
"It doesn't do any good in the long run is what I'm saying, Nobby, if you'd listen for five seconds together," said Fred Colon sharply.
"Yeah, but in the long run, what does, Sarge?”
Terry Pratchett “Thud"
Sometimes it is the only option worth consideration. Simple example is being confronted by an invader. Should everyone just capitulate and let them have their evil way ?