If Vitiges, as I believe, thought the imperialists would immediately follow him northward he was no more deceived than the Romans themselves.  They had surrendered the City to Belisarius to save it from attack and the last thing they desired was to suffer a siege.  A feeling of resentment, the old jealousy of Constantinople, seems to have appeared, and in this Vitiges thought he saw his opportunity.  With 150,000 men, according to Procopius, he issued from Ravenna and marched upon Rome, avoiding apparently the three forts held by the imperialists, for he came, again according to Procopius, through Sabine territory and therefore his advance was upon the eastern bank of the Tiber.  However that may be, he got without being attacked as far as the bridge over the Anio on the Via Salaria, or as the Milvian Bridge over the Tiber where the Via Cassia and the Via Flaminia meet to enter the City.[1] This bridge, whichever it was, Belisarius had determined to hold, but without his knowledge it was deserted.  The Goths were crossing unopposed when the general himself appeared with 1000 horse.  A tremendous fight followed in which, such was his rage and astonishment, Belisarius bore himself rather like a brave soldier than a wise general.  Unhurt in spite of the melee he fell back either upon the Porta Salaria[2] or upon the Porta Flaminia (del Popolo), which he found closed against him, for the City believed him dead.  Almost in despair he rallied his men and made a desperate charge, which, such was the number of the Goths in the road and the confusion of their advance, was successful.  The barbarians fled and Belisarius and his gallant troopers entered the City at nightfall.

[Footnote 1:  Procopius tells us both that Vitiges advanced through the Sabine country and that he crossed the Tiber—­an impossible thing.  Gibbon and Hodgkin refuse the former, Gregorovius the latter statement.  I agree with Gregorovius, for Procopius confuses the Tiber and Anio elsewhere, notably iii. 10.]

[Footnote 2:  Possibly the Porta Pinciana.]

[Illustration:  Sketch Map of VITIGES, MARCH]

All through that night the walls of Rome were aflame with watchfires and disastrous tidings, happily false; and when the dawn rose out of the Campagna, Rome was still inviolate.

Thus began the first siege of Rome in the early days of March 537.  It lasted for three hundred and seventy-four days and ended in the sullen retreat of the barbarians to save Ravenna, which as Vitiges had at first foreseen would happen was threatened with attack.  But as so often in later times, those three hundred and seventy-four days had dealt incomparably more hardly with the besiegers than with the besieged.  The Campagna had done its work, and it has been calculated that of the 150,000 men that are said to have marched with Vitiges to attack the city, not more than 10,000 returned to Ravenna.

Meanwhile during the great siege Belisarius, by means of his subordinate general, John, had carried on a campaign in Picenum and had been able to send assistance to the people of Milan, eagerly Roman as they were.