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 The World of Robert Jordan's "The Wheel of Time", Chapter 10.
Author: Atarah al'Norahn
The nation of Eharon was located in what is now known as Altara and Illian. To the south it is bordered by the Sea of Storms, while to the east and west like, respectively, Essenia, with the Manetheren between and Aelgar, bordered by the Eldar. Eharon shares a northwestern border with Manetheren, and a northeastern border with Coremanda.
Cities, Towns, and Villages
The capital city of Eharon was Londaren Cor; there was a Waygate located in the city (LoC, Ch. 20). The city was located a mile off from three very particular hills which used to be called The Dancers (KoD, Ch. 8). The city had paved roads and sprawled for miles. The people of the time considered the Ogier stone work of Londaren Cor to be even better than that of Tar Valon (KoD, Ch. 8).
Other cities of importance included: Barashta, which was located in what is now known as Ebou Dar, and Dorelle Caromon, located where Illian now stands. Both of these cities contained Waygates as well (LoC, Ch. 20).
Formation, Government, and Nobility
Like the other nations in its time, Eharon was formed sometime after the Breaking of the World.
The court of the capital Londaren Cor was probably located in the Palace of the Moon (KoD, Ch. 8). The only other thing known about the ruling of Eharon is that, at some time, there was a king named Maecine (TFoH, Ch. 22).
Before the Trolloc Wars
Around four or five hundred years before the beginning of the Trolloc Wars, there must have been some animosity between Eharon and Aelgar; King Maecine of Eharon led his army against Aelgar (TFoH, Ch. 22).
A possible feast celebrated in Eharon might have been called "Blessing of the Swords," during which there was an event called "Procession of Flutes" (KoD, Ch. 8).
The Trolloc Wars
As everyone knows, Eharon stood against the Shadow during the Trolloc Wars.
Eharon was one of the least affected nations during the Wars. However, despite this, major cities such as Barashta were destroyed (ACoS, Ch. 30).
After the Trolloc Wars
Eharon was one of the nations that survived the Trolloc Wars, though it was very weak. Within a short amount of time, according to the maps, the nation of Shiota was formed, which occupied most of the territory formerly occupied by Eharon, except for the border more closely following Manetheren. Later, Altara, grew out of the eventual ruins of Eharon.