well guarded, and
the king's camp near Schwedt defied attack, Tilly abandoned his
offensive plan of operations, and retreated towards the Elbe to besiege
Magdeburg.

The capture of Demmin opened to the king a free passage into
Mecklenburg; but a more important enterprise drew his arms into another
quarter. Scarcely had Tilly commenced his retrograde movement, when
suddenly breaking up his camp at Schwedt, the king marched his whole
force against Frankfort on the Oder. This town, badly fortified, was
defended by a garrison of 8,000 men, mostly composed of those ferocious
bands who had so cruelly ravaged Pomerania and Brandenburg. It was now
attacked with such impetuosity, that on the third day it was taken by
storm. The Swedes, assured of victory, rejected every offer of
capitulation, as they were resolved to exercise the dreadful right of
retaliation. For Tilly, soon after his arrival, had surrounded a
Swedish detachment, and, irritated by their obstinate resistance, had
cut them in pieces to a man. This cruelty was not forgotten by the
Swedes. "New Brandenburg Quarter", they replied to the Imperialists who
begged their lives, and slaughtered them without mercy. Several
thousands were either killed or taken, and many were drowned in the
Oder, the rest fled to Silesia. All their artillery fell into the hands
of the Swedes. To satisfy the rage of his troops, Gustavus Adolphus was
under the necessity of giving up the town for three hours to plunder.

While the king was thus advancing from one conquest to another, and, by
his success, encouraging the Protestants to active resistance, the
Emperor proceeded to enforce the Edict of Restitution, and, by his
exorbitant pretensions, to exhaust the patience of the states.
Compelled by necessity, he continued the violent course which he had
begun with such arrogant confidence; the difficulties into which his
arbitrary conduct had plunged him, he could only extricate himself from
by measures still more arbitrary. But in so complicated a body as the
German empire, despotism must always create the most dangerous
convulsions. With astonishment, the princes beheld the constitution of
the empire overthrown, and the state of nature to which matters were
again verging, suggested to them the idea of self-defence, the only
means of protection in such a state of things. The steps openly taken
by the Emperor against the Lutheran church, had at last removed the veil
from the eyes of John Geor