Note 8 — Chapter III · THE BARONS' WAR

This word, which is of course French but was adopted in English with the same signification, definitely means a body of men, originally mailed horsemen, drawn up together; but it implies nothing as to their formation or strength. The usual practice was to form three; the vanguard, which became ordinarily the right when in line of battle; the rearguard, which similarly became the left; and the main battle or centre. In the Latin chroniclers the equivalent term is generally acies, which occasionally leads to some confusion in interpreting their statements, as the classical sense of acies is order of battle, as contrasted with agmen, order of march.