A similar entry appears in the Wheel of Time Companion confirming the information available in the main story arc.
Unless stated otherwise, all information herein is taken from TWoRJTWoT, Ch. 11.
Author: Atarah al'Norahn
Fergansea was one of the nations of the Free Era. It was located in the southern part of the Westlands. To the north was Esandara, with Talmour to the northeast, Moreina to the east, the Sea of Storms to the south, and Shiota to the west. Eventually, this area of land became what is now Illian and the Plains of Maredo.
Fergansea and Moreina once went to war against each other (CoT, Ch. 1). The war included attacks from the sea.
By FY 943, Guaire Amalasan had conquered Fergansea, among other nations.
By FY 963, Fergansea had fallen to Hawkwing.