the legion was rearranged, about 366 B.C., into maniples IV of two centuries each; free room was left between each maniple and its neighbors, and the maniples of each succeeding line stood behind these open spaces. This formation made possible a rapid reinforcement of one line by the next, and a quick veering of one or more maniples to face a flank attack; and it gave free play to that individual combat for which the Roman soldier was especially trained.
