The War of the Ancients was a significant conflict in the lore of the World of Warcraft universe, occurring over 10,000 years before the events of the main game. It primarily involved the Night Elves, who fought against the Burning Legion, a demonic army led by the powerful titan Sargeras. This war was sparked by the discovery of the Well of Eternity, a source of immense magical power that attracted the attention of the Legion. The conflict saw the rise of notable figures such as Malfurion Stormrage and Tyrande Whisperwind, who played crucial roles in uniting the Night Elves against the invaders. Ultimately, the war led to the destruction of the Well of Eternity, which caused a massive cataclysm and reshaped the world of Azeroth. The War of the Ancients is a pivotal event that set the stage for many future conflicts in the game's storyline.