Agesilaus (6.6-6.7)

Night, for example, was to him as day, and day as night,[*] for he often veiled his movements so completely that none could guess where he was, whither he was going, or what he meant to do. Thus he made even strong positions untenable to the enemy, turning one, scaling another, snatching a third by stealth.

On the march, whenever he knew that the enemy could bring him to an engagement if they chose, he would lead his army in close order, alert and ready to defend himself, moving on as quietly as a modest maiden, since he held that this was the best means of maintaining calm, of avoiding panic, confusion, and blundering, and of guarding against a surprise attack.