The history here is lost.
The long and enduring Elemental Wars between all four Elemental Lords: Ragnaros, The Fire Lord, Terros, The Earth Lord, Thunros, Storm Lord and finally, Nepturos, The Water Lord
The Long Winter, when Argus' orbit around its star had been disrupted into a highly eliptical orbit, slowing its rotation and causing a neverending winter.
After years of war, the battle was finally won. Brightblade and the Dragon Aspects sacrificed themselves to allow the people of Argus remaining to live another day.
Era of Humanity, where most cities were founded and life began to take back Argus.
Founding of Firan Ko - Fire Beetle City by the nomadic tribes that roamed the thawing, frozen wasteland.
First great gathering of the first eight great cities to have been founded. Cold's Grasp is also renamed Salmyr
A historical date in history where the previous 8 great cities decided to meet and include the recently formed cities and attempt to bring an end to the Skirmishes of the South by signing the Treaty of Unity