Steal their sleep at night

Old emperors of the Romans used the thing more nakedly and more actively, bringing on at night to the camp of the opponents both the lightest infantry and, with them, trumpeter-horsemen, through whom they accomplished one of two things: either, catching the advance-guards and watches more careless, they destroyed those in the way, or they threw in a panic. Some both shot and threw javelins, and those sent from a sling, whenever they missed, were carried against tent or horse or weapon: the noise accomplished more than wounding, always striking the neighbor with fear. The trumpeters, riding round, sounded the war-note, so as always to furnish to those stationed at that point the impression that the enemies would fall on at any moment.

Then after day they led the camp out, by every means contriving not to join battle, and setting out the coming night like the one past, their own men resting with all leisure of day, or by the sending of others, and the same men always being plotted against to stay sleepless. Who does not know how unmanageable the things from this are? Pain of the head, bad eating, slackness of body from desire to sleep even somehow, the same condition succeeding night and day. Having done this next, we shall take the opponents at the first shout, made womanish by sleeplessness.