In 167, the Kingdom of Tympania, torn by civil strife and weakened by war on several fronts, was invaded by a coalition of Andar tribesmen from the far Twilight led by their Prince of Princes, Rollo. The Andar swept down the Lun Valley, then divided, one group curving Dawn into Chaeronia, the other, led by Rollo, marching through Tyr to Evasendia, where Mentius, claimant to the throne, kept his court. Both Mentius and Laeriolus were killed fighting the invaders, and Evasendia fell to Rollo's forces late that year.
Once in possession of Evasendia, Rollo dissolved the Councils and invested Mentius' nine-year-old son, Sarcon II, as the King of Tympania. Tympanian lands were parcelled out to the other Andar Princes throughout Tyr and Chaeronia. Ventria alone resisted the Andar invasion: protected by the mountains of Rhythnor and led by the strong Prince Severa Postuma, the Ventrians repulsed all Andar forays into their lands until, in 172, Rollo and the Prince signed a peace treaty and normalized their borders.
Rollo had intended to rule his new kingdom as a feudal monarchy, but once the war was over, his Princes refused to obey his commands. In 177, a rival Andar Lord named Bertol overthrew Rollo, executed the puppet king Sarcon, and took control of Evasendia and its surrounding lands himself. Centralized rule was not to return to Tyr or Chaeronia for another two hundred years.
