at 0 EOS, it is believed Herdaz was held by the Alethi, which started before the Recreance. This occupation would last until about 25 EOS.
A History of Herdazian Occupation
Throughout the History of Roshar, Herdaz has been frequently occupied. Usually, the occupation ends after an occupying force finds it too costly to continue holding.
For the first 400 years or so, this history is based off of speculation and oral/cultural history, as many written histories were destroyed or hidden by the Hierocracy.
When the timeline mentions Alethkar, except between 200-400 EOS, it means the ethnic people of the Alethi territory, however until 200 EOS, they did not consider themselves Alethi, and were just whichever lord held sway in the area.
Era of Solitude
0 EBS and beyond
Not much is known about this event in history, and many facts are partially hearsay and folklore, so not much can be trusted as completely objective. According to legend, the Knights Radiant abandoned humanity at the end of the last desolation in 0 EOS, betraying their oath to protect humanity, and disappearing. Since then, The Knights Radiant, and the ability to cast oldmagic, disappeared for hundreds of years.
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0 EOS
25 EOS
Althekar Occupation
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25 EOS
100 EOS
The First State of Herdaz
In 25 EOS, it is believed that Alethkar had a power struggle, and because of this the occupying forces left Herdaz. This would lead to formation of the Herdazian royal family, which lasts to today.
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100 EOS
125 EOS
Jah Keved Occupation
In 100 EOS, Jah Keved invaded Herdaz, deposing the Herdazian royal family and removing them entirely from power.
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125 EOS
150 EOS
Second Alethi Occupation
Jah Keved's occupation was cut short by their failure expanding East into Alethi territory. Alethkar forced back Jah Keved armies, and eventually entered and took control of Herdaz. The Alethi instated the Herdaz royal family to control the territory, however their interests were elsewhere and after 25 years or so, the royal family just declared independent sovereignty and the Alethi never stopped them.
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150 EOS
210 EOS
The Second State of Herdaz
After a declaration of sovereignty, the Herdazian royal family maintained the territory for 60 years before the uniting of Alethkar.
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210 EOS
343 EOS
Third Alethi Occupation
During this time, the Alethi held the territory of Jah Keved and Herdaz as united Alethkar. However in 340, Jah Keved declared their independence, claiming their original territory and Herdaz by 343 EOS.
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343 EOS
345 EOS
Second Jah Keved Occupation
A brief occupation of Herdaz by Jah Keved, which was ended quickly by Alethi forces who returned to reclaim Herdaz and Jah Keved.
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345 EOS
392 EOS
Fourth Alethi Occupation
Alethkar reclaim control of the Herdaz territory, however they installed the Herdazian royal family as the new territory ruler.
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392 EOS
405 EOS
The Third State of Herdaz (Hierocracy controlled)
Herdaz reclaimed control of their homeland, however the ardents of the Hierocracy began using the family as puppets, and held the governing body with an iron fist. This lasted until the end of the War of Loss, in which the Vorin church and religion was overhauled, forcing the ardents to give up arms, control, and property.
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405 EOS
437 EOS
The Third State of Herdaz
In the Third state, the royal family and the Herdaz people celebrated not only the end of the Hierocracy, but also the freedom of their lands. However, this would only last 32 years until Jah Keved took over Herdaz again.
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437 EOS
450 EOS
Third Jah Keved Occupation
Jah Keved took control in a surprise invasion of the territory, which shocked the continent. This occupation lasted 13 years.
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450 EOS
547 EOS
Fifth Alethi Occupation
The final occupation of Herdaz. This occupation would last nearly 100 years before Alethkar unity failed.
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547 EOS
The Fourth State of Herdaz (current state)
After the war for Veden independence, Herdaz eventually became independent, and has remained so ever since.
The world of Roshar, and a number of the characters within this setting are from the Stormlight Archive series, which is written by Brandon Sanderson. These characters and this setting belong to him, and I do not claim to own these characters or setting. We are merely playing within a world that he created.