The Long War

 The last King of Borgovia died without an heir. This began the War of Borgovian Succession as the four dukes warred upon the others for power.

The Western & Eastern Dukes fought bitterly to place themselves on the throne. Meanwhile the Northern Duke declared himself King in the North elevating his realm to a kingdom. The Southern Duke and his folk welcomed this as a return of their original independence and restoration of their Agiad culture. The royal overseas colonial possessions followed suit and declared their independence. 

Most historians regard the end of this period as the start of the Long War. The WBS period ended with an armistice that established East & West Borgovia as separate states with both recognizing the independence of Vinland & the Agiad. The armistice would not last.