Way back on my first character (who was -not- Tatia) I quested in Elwynn forest and eventually moved into Westfall. I read all of the quest text and paid attention to the story. At some point I got a quest sending me to Westfall.. and I remember reading about some NPC commenting how Westfall is overrun with Defias because everyone else has gone off to the war. At the time I wondered what level I’d have to be to catch up to the war front.
I kept thinking, maybe it’s in the next zone.. maybe suddenly I’ll stumble across the warfront.. Horde NPCs facing off with Alliance NPCs.. a huge battle.
I’ve never found the front.. in fact at this point I’m pretty sure it doesn’t exist. It’s just an unsatisfying answer.