The Romans undertook a night march to escape, but marched into another trap that Arminius had set, at the foot of Kalkriese Hill. There a sandy, open strip on which the Romans could march was constricted by the hill, so that there was a gap of only about 100 metres between the woods and the swampland at the edge of the Great Bog. The road was further blocked by a trench, and, towards the forest, an earthen wall had been built along the roadside, permitting the Germanic tribesmen to attack the Romans from cover. The Romans made a desperate attempt to storm the wall, but failed, and the highest-ranking officer next to Varus, Legatus Numonius Vala, abandoned the troops by riding off with the cavalry. His retreat was in vain, however, as he was overtaken by the Germanic cavalry and killed shortly thereafter, according to Velleius Paterculus. The Germanic warriors then stormed the field and slaughtered the disintegrating Roman forces. Varus committed suicide, and Velleius reports that one commander, Praefectus Ceionius, surrendered, then later took his own life, while his colleague Praefectus Eggius died leading his doomed troops.