So many personal motives, supported by important considerations, both of policy and religion, and seconded by pressing invitations from Germany, had their full weight with a prince, who was naturally the more jealous of his royal prerogative the more it was questioned, who was flattered by the glory he hoped to gain as Protector of the Oppressed, and passionately loved war as the element of his genius. But, until a truce or peace with Poland should set his hands free, a new and dangerous war was not to be thought of.
Cardinal Richelieu had the merit of effecting this truce with Poland.
This great statesman, who guided the helm of Europe, while in France he repressed the rage of faction and the insolence of the nobles, pursued steadily, amidst the cares of a stormy administration, his plan of lowering the ascendancy of the House of Austria.
But circumstances opposed considerable obstacles to the execution of his designs; and even the greatest minds cannot, with impunity, defy the prejudices of the age. The minister of a Roman Catholic king, and a Cardinal, he was prevented by the purple he bore from joining the enemies of that church in an open attack on a power which had the address to sanctify its ambitious encroachments under the name of religion.
The external deference which Richelieu was obliged to pay to the narrow views of his contemporaries limited his exertions to secret negociations, by which he endeavoured to gain the hand of others to accomplish the enlightened projects of his own mind. After a fruitless attempt to prevent the peace between Denmark and the Emperor, he had recourse to Gustavus Adolphus, the hero of his age.
No exertion was spared to bring this monarch to a favourable decision, and at the same time to facilitate the execution of it. Charnasse, an unsuspected agent of the Cardinal, proceeded to Polish Prussia, where Gustavus Adolphus was conducting the war against Sigismund, and alternately visited these princes, in order to 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 countries in which they were encamped. The strength, too, of the Emperor had been lessened by ill-timed detachments to Italy and the Netherlands;while Spain, weakened by the loss of the Manilla galleons, and engaged in a serious war in the Netherlands, could afford him little support.
Great Britain, on the other hand, gave the King of Sweden hope of considerable subsidies; and France, now at peace with itself, came forward with the most favourable offers.
But the strongest pledge for the success of his undertaking Gustavus found -- in himself. Prudence demanded that he should embrace all the foreign assistance he could, in order to guard his enterprise from the imputation of rashness; but all his confidence and courage were entirely derived from himself. He was indisputably the greatest general of his age, and the bravest soldier in the army which he had formed.
Familiar with the tactics of Greece and Rome, he had discovered a more effective system of warfare, which was adopted as a model by the most eminent commanders of subsequent times. He reduced the unwieldy squadrons of cavalry, and rendered their movements more light and rapid; and, with the same view, he widened the intervals between his battalions. Instead of the usual array in a single line, he disposed his forces in two lines, that the second might advance in the event of the first giving way.
