fact that emissaries from the Kushan Empire might have attended to the commemorative ceremonies for the Dacian War may have kindled in some Greco-Roman intellectuals like Plutarchwho wrote about only 70,000 Roman soldiers being necessary to a conquest of Indiaas well as in Trajan's closer associates, speculative dreams about the booty to be obtained by reproducing Macedonian Eastern conquests. There could also be Trajan's idea to use an ambitious blueprint of conquests as a way to emphasize quasi-divine status, such as with his cultivated association, in coins and monuments, to Hercules. Also, it is possible that the attachment of Trajan to an expansionist policy was supported by a powerful circle of conservative senators from Hispania committed to a policy of imperial expansion, first among them being the all-powerful Licinius Sura. Alternatively, one can explain the campaign by the fact that, for the Romans, their empire was in principle unlimited, and that Trajan only took advantage of an opportunity to make idea and reality coincide. Finally, there are other modern historians who think that Trajan's original aims were purely military and strategic: to assure a more defensible Eastern frontier for the Roman Empire, crossing Northern Mesopotamia along the course of the Khabur River in order to offer cover to a Roman Armenia. This interpretation is backed by the fact that all subsequent Roman wars against Parthia would aim at establishing a Roman presence deep into Parthia itself. It is possible that during the onset of Trajan's military experience, as a young tribune, he had witnessed engagement with the Parthians; so any strategic vision was grounded in a tactical awareness of what was needed to tackle Parthia. Course of the war The campaign was carefully planned in advance: ten legions were concentrated in the Eastern theatre; since 111, the correspondence of Pliny the Younger witnesses to the fact that provincial authorities in Bithynia had to organize supplies for passing troops, and local city councils and their individual members had to shoulder part of the increased expenses by supplying troops themselves. The intended campaign, therefore, was immensely costly from its very beginning. Trajan marched first on Armenia, deposed the Parthian-appointed king, Parthamasiris (who was afterwards murdered while kept in the custody of Roman troops in an unclear incident, later described by Fronto as a breach of Roman good faith), and annexed it to the Roman Empire as a province, receiving in passing the