Battle of the Shining Walls

From A Wheel of Time Wiki

The Battle of the Shining Walls, also known by the Aiel as Blood Snow, was the final great battle of the Aiel War, and took place outside the white city walls of Tar Valon, the high seat of the Aes Sedai. In this battle, King Laman was killed and thus the four Aiel clans that had left the Aiel Waste found their revenge for the king's desecration of the Avendoraldera (Laman's Sin) complete, leaving the Westlands to return to the Three-fold Land.

It was during this battle that the Maiden of the Spear called Shaiel gave birth to Rand al'Thor on the slopes of Dragonmount and died, as was prophesized in the Karaethon Cycle.