The Thrune Ascendancy refers to when House Thrune seized the throne of Cheliax ending 34 years of chaos and civil war following the death of Aroden in 4606 AR. The Treaty of Egorian was signed on the 19th day of Calistril, 4640 AR, and marked the commencement of the rule of House Thrune over Cheliax and its territories. Loyalty Day is held each year on the anniversary of the signing the treaty.