Tagma ( Greek τάγμα ), also Vigla ( Greek Βίγλα from Latin vigilia ) or Arifmos ( Greek Ἀριθμός ) - the main unit of division of the Roman army. In modern Greek, "tagma" means a battalion : the Dimitrovsky battalion is Greek. Τάγμα Δημητρόφ .
Tagmas of warriors are mentioned, united on the basis of a single territory and nationality (for example, the Tagma of the Colchians ) or another attribute (tagma of the “immortals”). There were also tagms of federates and optimates (that is, the "best"; this tag had no limitations in number). Metropolitan tagmas, the Roman Empire imperial guard: cavalry (scholes, excavations, arithms and ikanats ), infantry. The wall tag was guarded by the so-called " Long walls ." Excuvites and ikanats could be temporarily located in the province. (Despite the proud name “guard”, these formations were not necessarily really the best parts of the Byzantine army; in reality, this “guard” was something like a Russian streletsky army by the beginning of the 18th century .). According to the Strategicon of Mauritius , the tagma was to consist of 200-400 warriors. The Tagma commander was called the Tagmatarchis, Komit, and others. Tagma consisted of smaller units - hecatontarchies, decarchies, etc. The larger groups were formed from the Tagmas - the worlds (moira) or chiliarchies, headed by mirarchs (otherwise chiliarchs , duks). The world numbered 2-3 thousand people. Worlds united in three measures (meros) - right, middle and left. The average measure was commanded by hypostratigus .