Tatzates or Tatzatios ( el, Τατζάτης or Τατζάτιος, from hy, Տաճատ Tačat) was a prominent
Byzantine
The Byzantine Empire, also referred to as the Eastern Roman Empire or Byzantium, was the continuation of the Roman Empire primarily in its eastern provinces during Late Antiquity and the Middle Ages, when its capital city was Constantinopl ...
general of Armenian descent, who in 782 defected to the
Abbasids
The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttalib ...
and was appointed governor of ''
Arminiya
Arminiya, also known as the Ostikanate of Arminiya ( hy, Արմինիա ոստիկանություն, ''Arminia vostikanut'yun'') or the Emirate of Armenia ( ar, إمارة أرمينيا, ''imārat Arminiya''), was a political and geographic de ...
''.
Biography
Tatzates belonged to the noble Armenian Andzevatsi family. Probably in the 750s, he came to the Byzantine Empire and entered the service of Emperor
Constantine V
Constantine V ( grc-gre, Κωνσταντῖνος, Kōnstantīnos; la, Constantinus; July 718 – 14 September 775), was Byzantine emperor from 741 to 775. His reign saw a consolidation of Byzantine security from external threats. As an able ...
(r. 741–775)... Under Constantine V, he reportedly fought against the
Bulgars
The Bulgars (also Bulghars, Bulgari, Bolgars, Bolghars, Bolgari, Proto-Bulgarians) were Turkic semi-nomadic warrior tribes that flourished in the Pontic–Caspian steppe and the Volga region during the 7th century. They became known as noma ...
, and achieved the position of ''
strategos
''Strategos'', plural ''strategoi'', Latinized ''strategus'', ( el, στρατηγός, pl. στρατηγοί; Doric Greek: στραταγός, ''stratagos''; meaning "army leader") is used in Greek to mean military general. In the Helleni ...
'' (general and governor of a theme) by circa 760. It is not known which themes he commanded, but by 776 he led the Bucellarian Theme.. In the same year, he led his army in a successful expedition against the
Arabs
The Arabs (singular: Arab; singular ar, عَرَبِيٌّ, DIN 31635: , , plural ar, عَرَب, DIN 31635: , Arabic pronunciation: ), also known as the Arab people, are an ethnic group mainly inhabiting the Arab world in Western Asia, ...
, reaching
Samosata
Samsat ( ku, Samîsad), formerly Samosata ( grc, Σαμόσατα) is a small town in the Adıyaman Province of Turkey, situated on the upper Euphrates river. It is the seat of Samsat District.Germanikeia under the overall command of Michael Lachanodrakon, and in 781 he fought, again under Lachanodrakon, in the Byzantine victory at
Caesarea
Caesarea () ( he, קֵיסָרְיָה, ), ''Keysariya'' or ''Qesarya'', often simplified to Keisarya, and Qaysaria, is an affluent town in north-central Israel, which inherits its name and much of its territory from the ancient city of Caesar ...
over an Arab invasion led by 'Abd al-Kabir.
In 782, the Abbasid Caliph's son,
Harun al-Rashid
Abu Ja'far Harun ibn Muhammad al-Mahdi ( ar
, أبو جعفر هارون ابن محمد المهدي) or Harun ibn al-Mahdi (; or 766 – 24 March 809), famously known as Harun al-Rashid ( ar, هَارُون الرَشِيد, translit=Hārūn ...
(Caliph in 786–809), campaigned against the Byzantine Empire and invaded
Asia Minor
Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The re ...
. The Byzantines, under the
eunuch
A eunuch ( ) is a male who has been castrated. Throughout history, castration often served a specific social function.
The earliest records for intentional castration to produce eunuchs are from the Sumerian city of Lagash in the 2nd millenni ...
logothete Logothete ( el, λογοθέτης, ''logothétēs'', pl. λογοθέται, ''logothétai''; Med. la, logotheta, pl. ''logothetae''; bg, логотет; it, logoteta; ro, logofăt; sr, логотет, ''logotet'') was an administrative title ...
Staurakios, managed to cut off Harun's return and encircle his army. Tatzates chose this moment to defect to Harun with many of his men. His defection, however, was kept secret for a while, allowing Harun to seize the Byzantine envoys, Staurakios among them, who had come to negotiate a truce. The Abbasid commander was thus able to dictate harsh terms to Empress-regent
Irene of Athens
Irene of Athens ( el, Εἰρήνη, ; 750/756 – 9 August 803), surname Sarantapechaina (), was Byzantine empress consort to Emperor Leo IV from 775 to 780, regent during the childhood of their son Constantine VI from 780 until 790, co-ruler ...
.
The reasons for this action are not fully clear.
Theophanes the Confessor
Theophanes the Confessor ( el, Θεοφάνης Ὁμολογητής; c. 758/760 – 12 March 817/818) was a member of the Byzantine aristocracy who became a monk and chronicler. He served in the court of Emperor Leo IV the Khazar before taking ...
cites his hatred for Irene's favourite Staurakios, while the Armenian historian Ghevond Yerets, more plausibly, suggests that he lost favour at court and feared his imminent replacement as part of Irene's policy of removing Constantine V's staunchly iconoclast generals from power.. Theophanes also records that in his defection, Tatzates left behind his wife and all his property, and that they joined him only later, when peace was signed; Armenian sources, however, report that he took them with him when he defected. Harun appointed Tatzates as governor of ''
Arminiya
Arminiya, also known as the Ostikanate of Arminiya ( hy, Արմինիա ոստիկանություն, ''Arminia vostikanut'yun'') or the Emirate of Armenia ( ar, إمارة أرمينيا, ''imārat Arminiya''), was a political and geographic de ...
'' (the Transcaucasian principalities). He was killed during a campaign against the
Khazars
The Khazars ; he, כּוּזָרִים, Kūzārīm; la, Gazari, or ; zh, 突厥曷薩 ; 突厥可薩 ''Tūjué Kěsà'', () were a semi-nomadic Turkic people that in the late 6th-century CE established a major commercial empire coverin ...