which sought to increase state power. The most marked feature was the unprecedented intervention of the State down to the city level: whereas the State had submitted a tax demand to a city and allowed it to allocate the charges, from his reign the State did this down to the village level. In a vain attempt to control inflation, he imposed price controls which did not last. He or Constantine regionalised the administration of the empire which fundamentally changed the way it was governed by creating regional dioceses (the consensus seems to have shifted from 297 to 313/14 as the date of creation due to the argument of Constantin Zuckerman in 2002 "Sur la liste de Verone et la province de grande armenie, Melanges Gilber Dagron). The existence of regional fiscal units from 286 served as the model for this unprecedented innovation. The emperor quickened the process of removing military command from governors. Henceforth, civilian administration and military command would be separate. He gave governors more fiscal duties and placed them in charge of the army logistical support system as an attempt to control it by removing the support system from its control. Diocletian ruled the eastern half, residing in Nicomedia. In 296, he elevated Maximian to Augustus of the western half, where he ruled mostly from Mediolanum when not on the move. In 292, he created two 'junior' emperors, the Caesars, one for each Augustus, Constantius for Britain, Gaul, and Spain whose seat of power was in Trier and Galerius in Sirmium in the Balkans. The appointment of a Caesar was not unknown: Diocletian tried to turn into a system of non-dynastic succession. Upon abdication in 305, the Caesars succeeded and they, in turn, appointed two colleagues for themselves. After the abdication of Diocletian and Maximian in 305 and a series of civil wars between rival claimants to imperial power, during the years 306–313, the Tetrarchy was abandoned. Constantine the Great undertook a major reform of the bureaucracy, not by changing the structure but by rationalising the competencies of the several ministries during the years 325–330, after he defeated Licinius, emperor in the East, at the end of 324. The so-called Edict of Milan of 313, actually a fragment of a letter from Licinius to the governors of the eastern provinces, granted freedom of worship to everyone, including Christians, and ordered the restoration of confiscated church properties upon petition