Great Challenge

From time to time, the tribes of Pent will hold a great challenge to overcome some crisis. One was held in 1247 ST in response to a famine and a second was in 1355 ST. The point seems to be to provide some heroic focus for uniting the tribes for the 1355 ST challenge resulted in the Seleran Empire being formed. But the outcome of the 1247 ST challenge is mysteriou - the assembled combatants make an oath to walk on the moon and AgartuSay invades Kralorela?