Roman army was unique in many aspects and to this day its organization is copied in many different variants. At the time of the greatest Roman conquests, during the reign of emperor Trajan, the area controlled by his army was more or less the shape of a 9,000 x 16 thousand km rectangle. In this vast territory from Britain to Asia Minor and North Africa, 27 legions were stationing – about 150,000. people. And Romans could mobilize even more – about 300,000.
The military operations of this army were gigantic. Among the largest, one can mention the Trajan’s Dacian wars, fought in the area of present-day Romania at the turn of the 1st and the 2nd centuries CE. In the first of these wars, in the years 101-102 CE, over 150,000 soldiers participated, while in the second, in 105 CE, up to 200,000.
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