The transalpine Iapydes, a strong and savage tribe, drove back the Romans twice within the space of about twenty years, overran Aquileia, and plundered the Roman colony of Tergestus. When Augustus advanced against them by a steep and rugged road, they made it still harder for him by felling trees. As he advanced farther they took refuge in another forest, where they lay in ambush for the approaching foe. Augustus, who was always suspecting something of this kind, sent forces to occupy certain ridges which flanked both sides of his advance through the flat country and the fallen timber. The Iapydes darted out from their ambush and wounded many of the soldiers, but
the greater part of their own forces were killed by the Romans who fell upon them from the heights above. The remainder again took refuge in the thickets, abandoning their town, the name of which was Terponus. Augustus took this town, but did not burn it, hoping that they also would give themselves up, and they did so.