When Taran and his Companions came upon the wall during their pursuit of the Cauldron-Born on their way to Annuvin, they saw that the barrier was crumbling and that, if they meant to use it to turn back the deathless warriors, the many gaps in the stonework would have to be shored up with branches and weapons. Here Taran's force of Commot men fought a desperate battle against the Cauldron army. Many lives were lost in the effort, including that of Coll Son of Collfrewr, who from atop the wall single-handedly turned back a troop of Cauldron warriors.