The martial force of the people who occupied northern and central Europe in the time of the Romans, was chiefly composed of infantry[8]; but afterwards a great though imperceptible change took place, and, during all the long period which forms, in historic phrase, the middle ages, cavalry was the strongest arm of military power. Terms, expressive of this martial array, were sought for in its distinguishing circumstances. Among the ruins of the Latin language, _caballus_ signified a horse, _caballarius_ a horseman, and _caballicare_, to ride; and from these words all the languages that were formed on a Latin basis, derived their phrases descriptive of military duties on horseback. In all languages of Teutonic origin, the same circumstance was expressed by words literally signifying service. The German _knight_, the Saxon _cnight_, are synonymous to the French _cavalier_, the Italian _cavaliere_, and the Spanish _caballero_. The word _rider_ also designated the same person, preceded by, or standing without, the word _knight_. [Sidenote: Military and Moral Chivalry.] In the kingdoms which sprang from the ruins of the Roman empire, every king, baron, and person of estate was a knight; and therefore the whole face of Europe was overspread with cavalry. Considered in this aspect, the knighthood and the feudalism of Europe were synonymous and coexistent. But there was a chivalry within this chivalry; a moral and personal knighthood; not the well-ordered assemblage of the instruments of ambition, but a military barrier against oppression and tyranny, a corrective of feudal despotism and injustice. Something like this description of knighthood may be said to have existed in all ages and countries. Its generousness may be paralleled in Homeric times, and vice has never reigned entirely without control. But the chivalry, the gallant and Christian chivalry of Europe, was purer and brighter than any preceding condition of society; for it established woman in her just rank in the moral world, and many of its principles of action proceeded from a divine source, which the classical ancients could not boast of. [Sidenote: Origin of Chivalry.] [Sidenote: Usages of the Germans.] [Sidenote: Election of Soldiers.]