Maximinus II also known as Maximinus Daia or Maximinus Daza, was Roman Emperor from 308 to 313. He was born of Dacian peasant stock to the half sister of the emperor Galerius near their family lands around Felix Romuliana; a rural area then in the Danubian region of Moesia, now Eastern Serbia. He rose to high distinction after he had joined the army.
In 305, his maternal uncle Galerius became the eastern Augustus and adopted Maximinus, raising him to the rank of caesar with the government of Syria and Egypt.
In 308, after the elevation of Licinius to Augustus, Maximinus and Constantine were declared filii Augustorum ("sons of the Augusti"), but Maximinus probably started styling himself after Augustus during a campaign against the Sassanids in 310. On the death of Galerius, in 311, Maximinus divided the Eastern Empire between Licinius and himself. When Licinius and Constantine began to make common cause with one another, Maximinus entered into a secret alliance with the usurper Caesar Maxentius, who controlled Italy. He came to an open rupture with Licinius in 313, he summoned an army of 70,000 men, but still sustained a crushing defeat at the Battle of Tzirallum, in the neighbourhood of Heraclea Perinthus, on the April 30, and fled, first to Nicomedia and afterwards to Tarsus, where he died the following August. His death was variously ascribed "to despair, to poison, and to the divine justice".
Maximinus has a bad name in Christian annals, as having renewed persecution after the publication of the toleration edict of Galerius. Eusebius of Caesarea, for example, writes that Maximinus conceived an "insane passion" for a Christian girl of Alexandria, who was of noble birth noted for her wealth, education, and virginity – Saint Catherine of Alexandria. When the girl refused his advances, he had her beheaded, and then seized all of her wealth and assets.