This circle of waggons, the Carrago, was the usual fortification of the barbarians (Vegetius de Re Militari, 1. iii. c. 10. Valesius ad Ammian. xxxi. 7). The practice and the name were preserved by their descendants as late as the fifteenth century. The Charroy, which surrounded the 0st, is a word familiar to the readers of Froissart, or Comines.