The kingdom itself was also notable for being the main reason for the ending of the First Era; all main powers on Doras Edrossi had recognized its sovereignty by 7,647 BC/1E 7647. Starting as the Kingdom of Karth, it began to spread south and southwest, and at its peak it ruled the entirety of modern day Thyllanor, the Kingsland, Thunder's Shore, and the Wetlands, with Dimlight Pass of the Moonlyt Peaks. It collapsed only 20 years later in 7,627 BC/2E 20, however, due to infighting and the death of its main ruler, Anders. It is known that it negotiated terms with Edrane to ensure their independence, and the Thyllanorian kingdom's existence later inspired Old Edrane to unite as one princedom.