in Antiquity, properly denotes a Roman army in march; in which sense it stands contradistinguished from acies, which denoted the army in battle array; though, on some occasions, we find the two words used indifferently for each other. The Roman armies, in their marches, were divided into primum agmen, answering to our van-guard; medium agmen, our main-guard; and postremum agmen, the rear-guard. The order of their march was thus: after the first signal with the trumpets, &c. the tents were taken down, and the baggage packed up; at the second signal the baggage was to be loaded on the horses and carriages, and at the third signal they were to begin their march. First came the extraordinarii; then the auxiliaries of the first wing, with their baggage; and these were followed by the legions. The cavalry marched either on each side or behind.