ge
no war against Pomerania, nor against the German empire, but against the
enemies of both. In my hands this duchy shall be sacred; and it shall
be restored to you at the conclusion of the campaign, by me, with more
certainty, than by any other. Look to the traces of the imperial force
within your territories, and to mine in Usedom; and decide whether you
will have the Emperor or me as your friend. What have you to expect, if
the Emperor should make himself master of your capital? Will he deal
with you more leniently than I? Or is it your intention to stop my
progress? The case is pressing: decide at once, and do not compel me
to have recourse to more violent measures."

The alternative was a painful one. On the one side, the King of Sweden
was before his gates with a formidable army; on the other, he saw the
inevitable vengeance of the Emperor, and the fearful example of so many
German princes, who were now wandering in misery, the victims of that
revenge. The more immediate danger decided his resolution. The gates
of Stettin were opened to the king; the Swedish troops entered; and the
Austrians, who were advancing by rapid marches, anticipated. The
capture of this place procured for the king a firm footing in Pomerania,
the command of the Oder, and a magazine for his troops. To prevent a
charge of treachery, Bogislaus was careful to excuse this step to the
Emperor on the plea of necessity; but aware of Ferdinand's implacable
disposition, he entered into a close alliance with his new protector.
By this league with Pomerania, Gustavus secured a powerful friend in
Germany, who covered his rear, and maintained his communication with
Sweden.

As Ferdinand was already the aggressor in Prussia, Gustavus Adolphus
thought himself absolved from the usual formalities, and commenced
hostilities without any declaration of war. To the other European
powers, he justified his conduct in a manifesto, in which he detailed
the grounds which had led him to take up arms. Meanwhile he continued
his progress in Pomerania, while he saw his army daily increasing. The
troops which had fought under Mansfeld, Duke Christian of Brunswick, the
King of Denmark, and Wallenstein, came in crowds, both officers and
soldiers, to join his victorious standard.

At the Imperial court, the invasion of the king of Sweden at first
excited far less attention than it merited. The pride of Austria,
extravagantly elated by its unheard-of successes, looked dow