When the Empire was an Empire, the most important lands were the Twelve Duchies: Avanil, Boeruine, Mhoried, Diemed, Alamie, Osoerde, Aerenwe, Taeghas, Elinie, Cariele, Ghieste, and Bhalaene. All these lands still survive today, although Cariele has suffered in the expansion of Thurazor and the Five Peaks,
This seems to imply some provinces were lost to thurazor and five peaks. Is it ever specified as to which ones?