So i thought i was about to unlock the kul tiran humans, then this achievement popped up for the requirements…ive done the pride of kul tiras storyline already, but i can’t find the quest “war marches on”. Do i have to complete another quest chain first? I tried searching wowhead but can’t find a answer…
War Marches On is the last quest in a chain that is part of the Alliance war campaign.
The second comment on that page lists all the quests in order for that part for the Tides of Vengeance achievement.