We suppose that it was dux of Minor Armenia who headed and managed a huge military operation by order of Maximinus II Daia, this campaign was deployed on the territory of Great Armenia, an independent state under the ruling of the Arsacid dynasty, Great Armenia immediately bordered to Minor Armenia and lied east of Minor Armenia.

We dated this campaign by 312–313, in order to study the course of events we turned to Syrian and Armenian historical chronicles translated into modern West European and Latin languages. According to our point of view, in 312 the tribes of the Huns invaded in Great Armenia by instigation of the Persians, these Huns lived north to Caucasus mountain chain, obviously within modern Dagestan in Russia, they crossed the mountain passes and arrived in Great Armenia.

So, when the Huns invaded in Great Armenia and began to damage its territories, the king of Great Armenia Trdat III, who came to power by an assistance of the Romans as early as 298, applied to Maximinus II Daia for military help, in response Maximinus sent to Armenia a military corps, which consisted of three legions, that are XV Apollinaris, XII Fulminata and I Pontica.

In sum, dux of Minor Armenia and legions subordinated to him really held military action on the territory of Great Armenia, but not against Great Armenia, because their enemy was the Huns, who ravaged Armenian lands and could invade further in Roman lands.

We proposed that the first phase of a military campaign against the Huns happened under Maximinus II Daia in 312, in any case, before the winter of 312–313, but these military actions were successfully ended only by the new Emperor Licinius, who took control over Asia Minor in the spring of 313. At the same time, epigraphic data, hagiographical sources and administrative treatises enabled us to conclude that the Near East army of Maximinus, as in Minor Armenia, was composed only from the frontier units, that are vexillations, legions, alae and cohorts.

As we have noted above, in 324 an expeditionary army of Constantine I was transferred in Thrace at the Lower Danube, and next year this army received a high-ranking status ofcomitatenses, i. e. «those who follow the Emperor». However, a situation at the Near East front was not in the best conditions. Epigraphic data from Syria, Mesopotamia and Arabia enabled us to trace that during the last years of Constantine I's life, especially between 330 and 334, a defence of these regions was supported exclusively by the small frontier garrisons, alae and cohorts, which located in very scattered fortresses, these fortresses were removed far from each other by a long distances, and as a result, one garrison could not arrive and help in time to another if an external enemy launched an assault. Moreover, we concluded that the Near East frontier featured by a full absence of any units of expeditionary army up to 337, i. e. to a death of Constantine I. The first partial relocation of Constantine I's Danube expeditionary army ofcomitatenses happened only in 337, the last year of Constantine's reign. Then, in the spring of 337, Constantine marched against Persia and took with him some military units from the army ofcomitatenses, the Emperor moved them in Bithynia.