The Halcyon Concordant was the name of the peace treaty that officially ended the Dwello-Ironheart War. The treaty required the Kingdom of Dwellanor to pay war reparations to the Kingdom of Ironvale and it's allies in an effort to weaken Dwellanor economically to deter any future acts of aggression against the southern nations.

Soon after the signing of the treaty, the confederation known as the Halcyon Commonwealth was formed, binding the four allied nations of Zymith, Ironvale, Deucalia and Dalantai together in a defensive alliance, pledging to aid each other from against any foreign threats.