battle line at least four deep (see "Hell." III. iv.

13), and frequently much deeper. (The Persian cavalry in the engagement just referred to were twelve deep.)

1. See "Cyrop." III. iii. 41, 57; VI. iii. 24, 27; VII. i. 15; "Pol.

   Lac." xi. 5. These front-rank men would seem to correspond to our "troop guides," and the rear-rank men to our serre-files to some extent.

2. Cf. Aelian Tact. 26, ap. Courier.

The interval between the front and rear-rank men will best be filled supposing that the decadarchs are free to choose their own supports, and those chosen theirs, and so on following suit; since on this principle we may expect each man to have his trustiest comrade at his back.

As to your lieutenant,[7] it is every way important to appoint a good man to this post, whose bravery will tell; and in case of need at any time to charge the enemy, the cheering accents of his voice will infuse strength into those in front; or when the critical moment of retreat arrives, his sage conduct in retiring will go far, we may well conclude, towards saving his division.[8]

1. {ton aphegoumenon}, lit. "him who leads back" (a function which

   would devolve upon the {ouragos} under many circumstances). Cf.