n it.
The request he made, that Stralsund should receive an imperial garrison,
had been firmly and honourably rejected by the magistracy, who also
refused his cunningly demanded permission to march his troops through
the town, Wallenstein, therefore, now proposed to besiege it.
The independence of Stralsund, as securing the free navigation of the
Baltic, was equally important to the two Northern kings. A common
danger overcame at last the private jealousies which had long divided
these princes. In a treaty concluded at Copenhagen in 1628, they bound
themselves to assist Stralsund with their combined force, and to oppose
in common every foreign power which should appear in the Baltic with
hostile views. Christian IV. also threw a sufficient garrison into
Stralsund, and by his personal presence animated the courage of the
citizens. Some ships of war which Sigismund, King of Poland, had sent
to the assistance of the imperial general, were sunk by the Danish
fleet; and as Lubeck refused him the use of its shipping, this imperial
generalissimo of the sea had not even ships enough to blockade this
single harbour.
Nothing could appear more adventurous than to attempt the conquest of a
strongly fortified seaport without first blockading its harbour.
Wallenstein, however, who as yet had never experienced a check, wished
to conquer nature itself, and to perform impossibilities. Stralsund,
open to the sea, continued to be supplied with provisions and
reinforcements; yet Wallenstein maintained his blockade on the land
side, and endeavoured, by boasting menaces, to supply his want of real
strength. "I will take this town," said he, "though it were fastened by
a chain to the heavens." The Emperor himself, who might have cause to
regret an enterprise which promised no very glorious result, joyfully
availed himself of the apparent submission and acceptable propositions
of the inhabitants, to order the general to retire from the town.
Wallenstein despised the command, and continued to harass the besieged
by incessant assaults. As the Danish garrison, already much reduced,
was unequal to the fatigues of this prolonged defence, and the king was
unable to detach any further troops to their support, Stralsund, with
Christian's consent, threw itself under the protection of the King of
Sweden. The Danish commander left the town to make way for a Swedish
governor, who gloriously defended it. Here Wallenstein's good fortune
forsook him; a
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