Author: Atarah al'Norahn
Dhowlan was one of the nations of the Free Era. It was located in the southwestern part of the Westlands. To the north was Farashelle, with Shiota to the southeast, Kharendor to the south, Balasun to the southwest, Elan Dapor to the west, and Darmovan to the northwest. Eventually, this area of land became what is now known as Ghealdan.
By FY 943, Guaire Amalasan had conquered Dhowlan, among other nations.
By FY 963, Dhowlan had fallen to Hawkwing.
At one point in time, there was a King of Dhowlan named Garen, which is where the name for the cliff "Garen's Wall" came from. When Garen ruled, Dhowlan fought many wars against Farashelle.
References: The World of Robert Jordan's "The Wheel of Time", Tor FAQ.