A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Author: Atarah al'Norahn
Aldeshar was one of the nations of the Free Era. Aldeshar was located in the central area of the Westlands. To the north was Dal Calain, with Farashelle to the west, with the Manetherendrelle forming the border. Shiota lay to the south, and Caembarin and Nerevan to the east. Eventually, this area of land became what is now northernmost Murandy and the western part of Andor.
Aldeshar was one of the most powerful nations of the Free Era. However, around FY 943, during the War of the Second Dragon, fighting had begun in Aldeshar. Around FY 944, Aldeshar sent men to aid Caembarin against Artur Hawkwing.
As punishment for being the last nation to fall to him, Hawkwing treated Aldeshar cruelly. In several battles, there were no prisoners taken. He displaced nearly the whole population to other parts of the empire, and confiscated all of the noble's estates. The entire nobility and merchant class was reduced to absolute penury.
It was Tamika, Hawkwing's second wife, who convinced Hawkwing to relent in his harsh treatment of Aldeshar. He then allowed the people to return, and restored the confiscated estates and titles.
(Reference: The World of Robert Jordan's "The Wheel of Time")