The Immortals (Greek: Ἀθάνατοι, Athanatoi) were one of the elite tagmata military units of the Byzantine Empire, first raised during the late 10th century. The name derives from a- ("without") + thanatos ("death").
History
The Athanatoi were a body of young men of noble status that was originally raised by John I Tzimiskes (r. 969-976) in 970 for his war with the Rus', where they played a decisive role in the battles before Preslav and during the Siege of Dorostolon.[1][2] The unit was commanded by a domestikos, as with most of the other tagmata (the professional standing regiments), and on campaign camped near the imperial bodyguard, the Hetaireia.[1] The contemporary historian Leo the Deacon describes the Athanatoi as heavily armoured shock cavalry, "sheathed in armour" or as "armed horsemen adorned with gold".[3] Tzimiskes' unit was probably disbanded shortly after his death, since it does not appear again in the sources.[1]
The name of the Athanatoi was revived under the Emperor Michael VII (r. 1071–1078), when his minister Nikephoritzes reorganised the army.[1] This reconstruction was part of an effort to address a major military crisis for the Empire, following the disastrous defeat suffered by the Byzantines against the Seljuk Turks at the Battle of Manzikert in 1071. The Seljuks had subsequently overrun most of Asia Minor, which had provided the main recruiting ground for the pre-Manzikert army. As part of the reorganisation process, the remnants of the provincial troops of the Eastern themata (military provinces) were brought together as the Immortals, providing a new element of the tagma.[4] The new Immortals may have been cavalry, like the bulk of the old Byzantine field army, but this is not certain.
Contemporary documents seem to place the Athanatoi among other foreign contingents, but modern scholars usually consider the unit to have been composed of native Byzantines.[1] A schematic diagram of the standard field camp layout of the Byzantine army in the late 10th century shows the Immortals as deployed by the Imperial tent, within an outer square of Thematic units.[5]
Kühn, Hans-Joachim (1991). Die byzantinische Armee im 10. und 11. Jahrhundert: Studien zur Organisation der Tagmata (in German). Vienna: Fassbaender Verlag. ISBN3-9005-38-23-9.