Military action
A great earthquake Qabir would lead to misunderstandings between the Mnar and encroaching Sarnathi neighbors, leading to a series of ethnic cleansings in the midst of the Great Drought that would lead to the destruction of both Sarnath and Ib, setting off war between Ahl Alsahra and Mnar that would then spiral into a full-blown regional conflict between starving states previously held in check by Mnar authority. The decades of starvation and disruption would ultimately shatter east-west trade and collapse the great kingdoms of the era, bringing an end to the trade of tin, copper and luxury goods that fed the imperial armies. Starving peasant warriors rose up against their insulated, Mnar-supported rulers, snowballing into fleets of ethnically diverse raider fleets who would sail east and run roughshod over the warring states of the Crown Sea. Seasoned raiders wreaked havoc in Kemet, Shinar and Toprakkis, selling their swords to the highest bidder. These warriors ate at the slow decay of the both sides of the war, devouring their likely saviors before dispersing throughout the region in the form of militarized feifdoms.