Tachkastan
Tachkastan (also known as Tashik in Tang Chinese and Tayyaye in Syriac) was an independent Arab State from the time of the Battle of Dhi Qar until 692CE. It was situated in Al-Jazizah, Iraq between the Persian and Roman Empires. Sebeos tells us that it was a desert where the Edessan Jews were sent by Heraclius. In Tachkastan the exiled Edessan Jews met certain Ishmaelites (Sadducees). The Edessan Jews tried to establish a politcal alliance with the Ishmaelite-Sadducees they met in Tachkastan. However, they were unable to make any progress until Abu Bakr the Sadducee sent an Ishmaelite-Sadducee called Mahmet (Amrh) who rose to prominence. The Rulers over Tachkastan's Manichean polity included:
- Hani ibn Qabisa rose to power in 602. Liberated Tachkastan at the Battle of Dhi Qar. Allied from 628 with Hormizd of Nisibis who died in 632.
- Mahmet (Amrh) annexed Hani's western provinces in 633. Conquered Patriarchates of Jerusalem, Antioch and Alexandria. Died in 644.
- Emir Tashik 12yrs. Conquered Mediterranean. d.656
Tachkastan was consumed by 36 years of Fitna until 692 when Abdul Malik ibn Marwan killed Abdallah ibn Al-Zubayir and turned it into the Umyyad Caliphate.
According to a concordant synthesis of passages of the Arab-Byzantine Chronicle and the Diary of Egeria, the original "Makah" was located somewhere around בקעה בארץ שנער where Rome, Persia and Chaldea met indicating that Chaldea was to (or in) the North of Tachkastan. בקעה בארץ שנער is where Amraphel and future Abraham lived before future Abraham moved to Harran.
