To meet them the Byzantine commander would probably have no more than the 4000 heavy cavalry of his own Theme in hand; a force for whose handling Leo gives minute tactical directions[40]. When he had come up with the raiders they would turn and offer him battle: nor was their onset to be despised. Though unequal, man for man, to their adversaries, they were usually in superior numbers, and always came on with great confidence. ‘They are very bold at first with expectation of victory; nor will they turn at once, even if their line is broken through by our impact[41].’ When they suppose that their enemy’s vigour is relaxing, they all charge together with a desperate effort[42]. If, however, this failed, a rout generally ensued, ‘for they think that all misfortune is sent by God, and so, if they are once beaten, they take their defeat as a sign of divine wrath, and no longer attempt to defend themselves[43].’ Hence the Mussulman army, when once it turned to fly, could be pursued _à l’outrance_, and the old military maxim, ‘Vince sed ne nimis vincas,’ was a caution which the Byzantine officer could disregard. The secret of success in an engagement with the Saracens lay in the cavalry tactics, which had for three centuries been in process of elaboration. By the tenth century they attained their perfection, and the experienced soldier Nicephorus Phocas vouches for their efficacy. Their distinguishing feature was that the troops were always placed in two lines and a reserve, with squadrons detached on the flanks to prevent their being turned. The enemy came on in one very deep line, and could never stand the three successive shocks as the first line, second line, and reserve were one after another flung into the mêlée against them. The Byzantines had already discovered the great precept which modern military science has claimed as its own, that, ‘in a cavalry combat, the side which holds back the last reserve must win[44].’ The exact formation used on these occasions, being carefully described by our authorities, is worth detailing, and will be found in our section treating of the organization of the Byzantine army. There were several other methods of dealing with the Saracen invader. It was sometimes advisable, when his inroad was made in great force, to hang about the rear of the retreating plunderers, and only fall upon them when they were engaged in passing the ‘Klissuras’ of the Taurus. If infantry was already on the spot to aid the pursuing cavalry, success was almost certain, when the Saracens and their train of beasts, laden with spoil, were wedged in the passes. They could then be shot down by the archers, and would not stand for a moment when they saw their horses, ‘the “Pharii,” whom they esteem above all other things[45],’ struck by arrows from a distance; for the Saracen, when not actually engaged in close combat, would do anything to save his horse from harm.