The forces, however, which Rome had here at her disposal, were more than inadequate. The insignificant garrison of Asia Minor, and the fleet, likewise small on the Black Sea, were of account at most for the Greek inhabitants of its northern and western coasts. A very difficult task was assigned to the governor of Moesia, who with his two legions had to protect the bank of the Danube from Belgrade to the mouth; and the aid of the far from obedient Thracians was under the circumstances an additional danger. Especially towards the mouth of the Danube there was wanting a sufficient bulwark against the barbarians now pressing on with increasing weight. The withdrawal on two occasions of the Danubian legions to Italy in the troubles after Nero's death provoked still more at the mouth of the Danube, than on the lower Rhine, incursions of the neighbouring peoples, at first of the Roxolani, then of the Dacians, then of the Sarmatae, that is, probably the Jazyges. There were severe conflicts; in one of these engagements, apparently with the Jazyges, the brave governor of Moesia, Gaius Fonteius Agrippa, fell. Nevertheless, Vespasian did not proceed to increase the army of the Danube;[126] the necessity of strengthening the Asiatic garrisons must have appeared still more urgent, and the economy specially enjoined at that time forbade any increase of the army as a whole. He contented himself with pushing forward the great camps of the army of the Danube to the frontier of the empire, as the pacification of the interior allowed, and the relations subsisting at the frontier, as well as the breaking up of the Thracian troops brought about by the annexation of Thrace, imperatively required. Thus the Pannonian camps were brought away from the Drave, opposite to the Suebian kingdom, to Carnuntum and Vindobona (p. 206), and the Dalmatian from the Kerka and the Cettina to the Moesian bank of the Danube,[127] so that the governor of Moesia thenceforth disposed of double the number of legions. [Sidenote: Dacian war of Domitian.] [Sidenote: Decebalus.]