But he made rapid progress in the army of the Revolution, being a man of great courage and unusual military genius. Under Napoleon, whose discerning eye no soldier of ability escaped, Bernadotte became one of the most successful of the French generals, was made governor of a province, ambassador, and minister of war, and had much to do with winning the great victories of Austerlitz, Jena, and Wagram. Finally he was made a marshal of France and prince of Ponte Corvo in Italy. But Napoleon had doubts of him. He was too independent. He opposed the emperor's ambitious plans and defended the liberties of the people, and was distrusted by the conqueror for other causes. The astute Corsican feared that he would not be the man to reduce Sweden to a province of France, and the event proved that Napoleon was right. It was in 1810 that Crown Prince Bernadotte, who adopted the name of Charles John as the title of his new rank, arrived in Sweden with his son Oscar. The people were delighted with his appearance. A handsome and imposing man, with black wavy hair, an eagle nose, keen, penetrating eyes and the manner of one accustomed to command, also a clear and eloquent speaker, polished in address and courteous in his dealings with all, they felt that in him they had a true king; while his reputation as one of the leading soldiers in Napoleon's great army gave them assurance that, if war should arise, their armies would be ably led. Sweden, when Bernadotte set foot on its soil, was in a helpless state of decadence, having become little better than a dependency of France. If ever it needed a strong ruler then was the time, but Charles XIII. was incapable as a monarch, and from the time of his landing the new crown prince ruled the country as though there were no king on the throne. He at once renounced Catholicism and was admitted into the Lutheran church, the state religion of Sweden. Proposing to consult the best interests of his new country and not to rule as a vassal of Napoleon, he was indignant when the emperor ordered that Sweden should declare war against England. In the existing condition of the country he felt compelled to submit, but he secretly advised the British government that the declaration of war was a mere formality and not a gun was fired on either side. He also made a secret alliance with Alexander of Russia. None of these movements could be made public, for the Swedes were then fervent admirers of Napoleon and hoped by his aid to gain the lost province of Finland and win revenge upon Russia, their old enemy. Bernadotte saw farther than they, feeling that the inordinate ambition of Napoleon must lead to his downfall and that it was best for Sweden to have an anchor out to leeward. But all these political deals had to be kept from the knowledge of the Swedes.