persuade them to a truce or peace. Gustavus had been long inclined
to it, and the French minister succeeded at last in opening the eyes of
Sigismund to his true interests, and to the deceitful policy of the
Emperor. A truce for six years was agreed on, Gustavus being allowed to
retain all his conquests. This treaty gave him also what he had so long
desired, the liberty of directing his arms against the Emperor. For
this the French ambassador offered him the alliance of his sovereign and
considerable subsidies. But Gustavus Adolphus was justly apprehensive
lest the acceptance of the assistance should make him dependent upon
France, and fetter him in his career of conquest, while an alliance with
a Roman Catholic power might excite distrust among the Protestants.

If the war was just and necessary, the circumstances under which it was
undertaken were not less promising. The name of the Emperor, it is
true, was formidable, his resources inexhaustible, his power hitherto
invincible. So dangerous a contest would have dismayed any other than
Gustavus. He saw all the obstacles and dangers which opposed his
undertaking, but he knew also the means by which, as he hoped, they
might be conquered. His army, though not numerous, was well
disciplined, inured to hardship by a severe climate and campaigns, and
trained to victory in the war with Poland. Sweden, though poor in men
and money, and overtaxed by an eight years' war, was devoted to its
monarch with an enthusiasm which assured him of the ready support of his
subjects. In Germany, the name of the Emperor was at least as much
hated as feared. The Protestant princes only awaited the arrival of a
deliverer to throw off his intolerable yoke, and openly declare for the
Swedes. Even the Roman Catholic states would welcome an antagonist to
the Emperor, whose opposition might control his overwhelming influence.
The first victory gained on German ground would be decisive. It would
encourage those princes who still hesitated to declare themselves,
strengthen the cause of his adherents, augment his troops, and open
resources for the maintenance of the campaign. If the greater part of
the German states were impoverished by oppression, the flourishing Hanse
towns had escaped, and they could not hesitate, by a small voluntary
sacrifice, to avert the general ruin. As the imperialists should be
driven from the different provinces, their armies would diminish, since
they were subsisting on the