In the meantime Albinus' troops on the right wing, having concealed trenches in front of them and pits covered over with earth on the surface, advanced as far as these pitfalls and hurled their javelins at long range; then, instead of continuing to go forward, they turned back, as if frightened, with the purpose of drawing their foes in pursuit. And this is exactly what happened. For Severus' men, nettled by their brief charge and despising them for their flight after so short an advance, rushed against them in the belief that the whole intervening distance was passable; but on reaching the trenches, they met with a terrible disaster. For the men in the front rank, as soon as the surface-covering was broken through, fell into the excavations,
Edition :
Dio's Roman History. Cassius Dio Cocceianus. Earnest Cary. Herbert Baldwin Foster. William Heinemann, Harvard University Press. London; New York. 1914-.