The 3rd Draconic War

Description
While tensions between the various Draconic races were always high, this rarely led to war. However, somewhere between the 43th and 42nd century BF, a schism occurred among Dragonkind. Neither side has ever revealed the reason, but it caused them to divide into two camps: the Metallic and Ferrous Dragons on one side, the Chromatic and Gem Dragons on the other.

This led to a decades long cold war, with the occasional brief skirmish. The conflict escalated when an Obsidian Dragon named Archaeon attacked a Gold Dragon nursery with his followers, slaying many Wyrmlings, earning him the title ‘Dread’. Full-scale war followed with Dragons battling in the skies. Outnumbered, the Metallic and Ferrous Dragons sought allies among the humanoid races. This alliance tipped the course of the war in their favor, although casualties continued to mount.

Eventually, both sides grew weary of battle and agreed to an armistice. While the war is officially still ongoing, all parties settled back into their old roles over time. Archaeon was branded a war criminal and vanished. Several of the humanoid heroes who fought on the side of the Metallic Dragons went on to found new nations from the broken remnants of the old, or otherwise obtained positions of great power.