one brought from the east by Verus's
legions, the other caused by floods which had destroyed vast quantities
of grain. After all had been done possible to allay famine and to supply
pressing needs--Marcus being forced even to sell the imperial jewels to
find money--both emperors set forth to a struggle which was to continue
more or less during the rest of Marcus's reign. During these wars, in
169, Verus died. We have no means of following the campaigns in detail;
but thus much is certain, that in the end the Romans succeeded in
crushing the barbarian tribes, and effecting a settlement which made the
empire more secure. Marcus was himself commander-in-chief, and victory
was due no less to his own ability than to his wisdom in choice of
lieutenants, shown conspicuously in the case of Pertinax. There were
several important battles fought in these campaigns; and one of them has
become celebrated for the legend of the Thundering Legion. In a battle
against the Quadi in 174, the day seemed to be going in favour of
the foe, when on a sudden arose a great storm of thunder and rain the
lightning struck the barbarians with terror, and they turned to rout.
In later days this storm was said to have been sent in answer to the
prayers of a legion which contained many Christians, and the name
Thundering Legion should be given to it on this account. The title of
Thundering Legion is known at an earlier date, so this part of the story
at least cannot be true; but the aid of the storm is acknowledged by one
of the scenes carved on Antonine's Column at Rome, which commemorates
these wars.

The settlement made after these troubles might have been more
satisfactory but for an unexpected rising in the east. Avidius Cassius,
an able captain who had won renown in the Parthian wars, was at this
time chief governor of the eastern provinces. By whatever means induced,
he had conceived the project of proclaiming himself emperor as soon as
Marcus, who was then in feeble health, should die; and a report having
been conveyed to him that Marcus was dead, Cassius did as he had
planned. Marcus, on hearing the news, immediately patched up a peace and
returned home to meet this new peril. The emperors great grief was that
he must needs engage in the horrors of civil strife. He praised the
qualities of Cassius, and expressed a heartfelt wish that Cassius might
not be driven to do himself a hurt before he should have the opportunity
to grant a free pardon.