by the latter at the head of a Celtic squadron of horse to take part in the Parthian war, was inflamed with a vehement desire for the fight.  When no tidings came, they resolved to advance at a venture; the signal for starting was given, the Balissus was crossed, the army after a brief insufficient rest at noon was led on without delay at a rapid pace.  Then suddenly the kettledrums of the Parthians sounded all around; on every side their silken gold-embroidered banners were seen waving, and their iron helmets and coats of mail glittering in the blaze of the hot noonday sun; and by the side of the vizier stood prince Abgarus with his Bedouins.

Roman and Parthian Systems of Warfare

The Romans saw too late the net into which they had allowed themselves to be ensnared.  With sure glance the vizier had thoroughly seen both the danger and the means of meeting it.  Nothing could be accomplished against the Roman infantry of the line with Oriental infantry; so he had rid himself of it, and by sending a mass, which was useless in the main field of battle, under the personal leadership of king Orodes to Armenia, he had prevented king Artavasdes from allowing the promised 10,000 heavy cavalry to join the army of Crassus, who now painfully felt the want of them.  On the other hand the vizier met the Roman tactics, unsurpassed of their kind, with a system entirely different.  His army consisted exclusively of cavalry; the line was formed of the heavy horsemen armed with long thrusting-lances, and protected, man and horse, by a coat of mail of metallic plates or a leathern doublet and by similar greaves; the mass of the troops consisted of mounted archers.  As compared with these, the Romans were thoroughly inferior in the corresponding arms both as to number and excellence.  Their infantry of the line, excellent as they were in close combat, whether at a short distance with the heavy javelin or in hand-to-hand combat with the sword, could not compel an army consisting merely of cavalry to come to an engagement with them; and they found, even when they did come to a hand-to-hand conflict, an equal if not superior adversary in the iron-clad hosts of lancers.  As compared with an army like this Parthian one, the Roman army was at a disadvantage strategically, because the cavalry commanded the communications; and at a disadvantage tactically, because every weapon of close combat must succumb to that which is wielded from a distance, unless the struggle becomes an individual one, man against man.  The concentrated position, on which the whole Roman method of war was based, increased the danger in presence of such an attack; the closer the ranks of the Roman column, the more irresistible certainly was its onset, but the less also could the missiles fail to hit their mark.  Under ordinary circumstances, where towns have to be defended and difficulties of the ground have to be considered, such tactics operating merely with cavalry against