The moral effect of this invasion upon the Rhætians, through whose territory the Cimbri had passed, bore fruit a few years later, when they attempted the same tactics, making frequent raids into Roman territory. Some sixty years after the incursion of the Cimbri they were defeated and driven back into their valleys and mountains by the Roman general, Munatius Plancus; and a few years later, in 36 B.C., not only was a fresh raid repulsed, but the invaders were followed home, and a considerable portion of the district in the neighbourhood of what is now known as Trent was taken possession of by the Roman forces. [Sidenote: ROMAN CONQUEST OF TYROL] The Rhætians, however, were a hardy, valorous, and pugnacious tribe, and so frequent were their attacks upon the Roman forces left to hold the conquered country that the Emperor Augustus, about twenty years after the subjection of the Trent district, decided as a measure of self-protection on the conquest of the whole of Rhætia, as far as the River Danube. And for this work he deputed his two stepsons, Drusus and Tiberius. The campaign, historians are agreed, was planned with great skill, and probably by the Emperor himself. The Roman forces were divided, one portion, under Drusus, entering Tyrol from the south, having Tridentum (Trent) as its base; and the other, under Tiberius, delivering its attack from the west across what is now Switzerland. Tiberius took this route (the most direct, though a difficult one) because at that time he was absent from Italy, in Gaul, as governor. Drusus had a more easy task, and pushed his way up the wide valley of the River Adige[2] to the present site of Bozen. His objective was the Pass of the Brenner, which, once seized, would give him the command of the country. His advance was not, however, made without opposition, for the Breones and Genones, who dwelt in the vicinity of the Brenner, attacked the Roman forces, and a fierce battle and series of skirmishes ensued. Horace, in Book IV., Ode 14 and 4, gives a vivid if, possibly, highly coloured account of the struggle which took place in the gorge near Bozen. The river Icarous ran red with the blood of both conquerors and conquered. And--as has been the case on many subsequent occasions when fighting has had to be done by the Tyrolese--the women played a valorous part, even, according to the historian, Florus, throwing their infant children into the faces of the Roman soldiery when other weapons failed. The campaign of the two stepsons of Augustus resulted in the complete and final conquest of Tyrol. The victory, won in the narrow gorge of the Eisack, was commemorated in the name of the bridge _Pons Drusi_ spanning the river, hard by which now stands the interesting mediæval town of Bozen.