For transport in war the Hittites seem to have employed freely a covered wagon on four wheels, a characteristic vehicle throughout western Asia to-day, and drawn then as now either by bullocks or a pair of horses. In addition, the hardy ass was also requisitioned, represented as struggling with the weight of his panniers.[892] Though for the frontier wars with Egypt, fought out mostly near the Lebanon, the Hittite doubtless employed a strategic base in northern Syria, such as Carchemish, yet for his Syrian campaigns, and for the general control of his Syrian dependencies, it becomes almost self-evident that there must have been one route at least available for wheeled traffic connecting with the interior and the capital. But it is by no means easy to determine which of the several passes may have been used for this purpose.[893] The history of these times leads us to infer a system of communication throughout the empire, with Boghaz-Keui as its focus. From this centre, to judge by the disposition of the earlier monuments and other evidence, roads already radiated in several directions. To the north was Sinope,[894] which seems at one time to have been the first port of the country, but to have fallen into decline with Boghaz-Keui itself. To the east we must infer a road connecting the valley of the Halys, whether by way of Sivas or otherwise, with that of the Tochma Su,[895] and so leading down to the frontier at Malatia. A southerly bifurcation of this route led by Albistan down the passes of the Pyramus to Marash,[896] communicating thence severally with Carchemish, Aleppo, and the valley of the Kara Su, wherein lay the cities of Sakje-Geuzi and Sinjerli. A more direct track over the mountains from Mazaca (Cæsarea) to Marash passed by Kuru-Bel near old-time Comana,[897] whence also Dastarkon (near Ferakdin) might be approached. The line of communication from Boghaz-Keui to Mazaca is not known, but a direct road from the former towards Tyana is traceable, and possibly it sent off a branch corresponding with the modern route from Injessu to Cæsarea. Whether in its direct southerly line it continued as a wheel track thus early through the Cilician gates to Tarsus is open to question, though it was clearly open some three centuries later.[898] Westward also there must have been established now or shortly afterwards an embranchment connecting Tyana by way of Ardistama with Iconium; while, as we have already noted,[899] the existence of a main westerly route from Boghaz-Keui to the Lydian coast is testified by the contemporary sculptures of Giaour-Kalesi and Kara-Bel.