ly advanced to meet
the enemy's army of 30,000 men.

The latter had taken the route across the Danube into Swabia, where
Gustavus Horn came so close upon them, that the two armies were only
separated from each other by half a German mile. But, instead of
accepting the offer of battle, the Imperialists moved by the Forest
towns towards Briesgau and Alsace, where they arrived in time to relieve
Breysack, and to arrest the victorious progress of the Rhinegrave, Otto
Louis. The latter had, shortly before, taken the Forest towns, and,
supported by the Palatine of Birkenfeld, who had liberated the Lower
Palatinate and beaten the Duke of Lorraine out of the field, had once
more given the superiority to the Swedish arms in that quarter. He was
now forced to retire before the superior numbers of the enemy; but Horn
and Birkenfeld quickly advanced to his support, and the Imperialists,
after a brief triumph, were again expelled from Alsace. The severity of
the autumn, in which this hapless retreat had to be conducted, proved
fatal to most of the Italians; and their leader, the Duke of Feria, died
of grief at the failure of his enterprise.

In the mean time, Duke Bernard of Weimar had taken up his position on
the Danube, with eighteen regiments of infantry and 140 squadrons of
horse, to cover Franconia, and to watch the movements of the
Imperial-Bavarian army upon that river. No sooner had Altringer
departed, to join the Italians under Feria, than Bernard, profiting by
his absence, hastened across the Danube, and with the rapidity of
lightning appeared before Ratisbon. The possession of this town would
ensure the success of the Swedish designs upon Bavaria and Austria; it
would establish them firmly on the Danube, and provide a safe refuge in
case of defeat, while it alone could give permanence to their conquests
in that quarter. To defend Ratisbon, was the urgent advice which the
dying Tilly left to the Elector; and Gustavus Adolphus had lamented it
as an irreparable loss, that the Bavarians had anticipated him in taking
possession of this place. Indescribable, therefore, was the
consternation of Maximilian, when Duke Bernard suddenly appeared before
the town, and prepared in earnest to besiege it.

The garrison consisted of not more than fifteen companies, mostly
newly-raised soldiers; although that number was more than sufficient to
weary out an enemy of far superior force, if supported by well-disposed
and warlike inhabitant