I could almost picture Travis saying this if he wasn't played by such a horrible actor.I can't picture anyone in any other Trek series saying something like that. I equate it to coward+concussion.
Even the mission into The Expanse didn't qualify as an actual war, and no one on the Enterprise ever calls it that. They keep talking about it as a mission to find the Xindi and either issue a strongly worded "What the fuck, dude!" to their leaders or, at the very least, sabotage their superweapon.
It's quite possible this is the first time in history the Federation has actually been at war with anyone, assuming the Romulan War took place before the founding of the Federation. And even then, it's a weird war; the Klingons never actually DECLARE a state of war, they just collectively decide to start kicking raiding the Federation and conquering a bunch of their planets. It's more like a galactic gang war than any conventional military conflict.