d.
Abgarus with his Arabs was sent out to reconnoitre; the Parthian
squadrons retired up to and over the river and vanished
in the distance, pursued by Abgarus and his followers. With impatience
the Romans waited for his return and for more exact information.
The general hoped here at length to come upon the constantly
retreating foe; his young and brave son Publius, who had fought
with the greatest distinction in Gaul under Caesar,(5) and had been sent
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