Page:Political History of Parthia.pdf/277

Rh tory, which seems to have been under the control of Osroes during the Adiabene campaign.

Trajan's whole campaign followed the pattern set by Caesar, and comparison with later and better known expeditions makes fairly clear the route followed. That there was an army on the Euphrates is proved by numerous references to it and by a triumphal arch at Dura-Europus, there is no evidence for another on the Tigris. The erection of the arch and the presence of Trajan at Ozogardana, just below modern Hit, suggest that the Emperor accompanied the Euphrates force. Present evidence leads us to believe, then, that Trajan and his army descended the Euphrates River along with the fleet, which kept pace with the land forces. Only the steersmen and the lookouts were trained sailors; the other members of the crews were recruited from the villages along the