The latter invaded their territory at many points at once in order that they might not unite and become harder to subdue, and had a very easy time in conquering them because they attacked him only in small groups. Having forced them to capitulate he demanded a fixed sum of money, allowing it to be supposed that he would impose no other punishment. After that he sent soldiers everywhere, apparently to attend to the collection of the indemnity and arrested those of military age, whom he sold under an agreement that none of them should be liberated within twenty years. The best of their land was given to members of the Pretorians and came to include a city called Augusta Prætoria.[8] Augustus himself waged war upon the Astures and upon the Cantabri at the same time. These refused to yield, because of confidence in their position on the heights, and would not come to close quarters owing to their inferior numbers and the fact that most of them were javelin throwers, but they caused him much trouble, whenever he made any movement, by always seizing the higher ground in advance and placing ambuscades in depressions and in wooded spots. He found himself therefore quite unable to cope with the difficulty, and having fallen ill from weariness and worry retired to Tarraco, and there remained sick. Meantime Gaius Antistius fought against them, accomplishing considerable, not because he was a better general than Augustus, but because the barbarians felt contempt for him and thus joined battle with the Romans and were defeated. In this way he captured some points, and afterward Titus[9] Carisius took Lancia, the principal fortress of the Astures, which had been abandoned, and won to his side many towns.