Polemo II's alleged inability to control Euxine piracy, especially after Corbulo had turned Trapezus into an important supply base for Roman forces on the upper Euphrates, can be safely dismissed as a motive for the annexation of Pontus.
(84) Opening a supply line from Trapezus, through the Pontic Alps into Armenia Minor became one of his first priorities.
(91) Even in the late 2nd and early 3rd centuries, when vexillations of XV Apollinaris or XII Fulminata manned (never simultaneously) Trapezus, a vexillation of XV Apollinaris garrisoned Pityus, another legionary vexillatio of unknown origin was (at least during Hadrian's reign) at Phasis, and auxilia unit(s) inhabited Apsarus, Roman forces in the eastern Euxine probably never numbered 3000.
Corbulo had established the significance of Trapezus perhaps as early as 55 and Polemo II had based his fleet there.
Trapezus, however, the classis Ponticas initial base, was hardly ideal, offering an anchorage but not a real harbor, until Hadrian had one built in the 120s.
Trapezus not only connected the Cappadocian army on the upper Euphrates with the Euxine but also served the various garrisons on the Colchian coast.
A classis Pontica, based at Trapezus and operating from Amasus in the west to Dioscurias or Pityus in the northeast would essentially be a classis Cappadocica, a typical provincial fleet, the naval extension of an imperial provincial governor's military command.
Graf 1994 on the Nabataean army), no trace of Polemo II's army survives after a cohort at Trapezus was mangled during Anicetus' revolt in 69.
Starr (1993:126) erroneously thinks Trapezus was Polemo's capital.
Sarnowski (2006b:89) thinks V Macedonica came by sea to Trapezus. If XV Apollinaris from Pannonia used the faster maritime route (a lesson from the V Macedonica's experience?) the next year, it would firmly eliminate Heil's argument (1997:119-20) for re-dating Corbulo's 63 campaign to 64, based on the estimated time required for a march from Carnuntum to the Euphrates.
3.1); thus, excluding Trapezus, far less than 2000 men are attested at the time of Arrian's governorship (c.
Starr believes (1993:128) that Trapezus' significance declined with the improved road network in Anatolia.