Gustavus Adolphus was the first who landed. In the presence of his suite, he knelt on the shore of Germany to return thanks to the Almighty for the safe arrival of his fleet and his army. He landed his troops on the Islands of Wollin and Usedom; upon his approach, the imperial garrisons abandoned their entrenchments and fled. He advanced rapidly on Stettin, to secure this important place before the appearance of the Imperialists. Bogislaus XIV., Duke of Pomerania, a feeble and superannuated prince, had been long tired out by the outrages committed by the latter within his territories; but too weak to resist, he had contented himself with murmurs. The appearance of his deliverer, instead of animating his courage, increased his fear and anxiety. Severely as his country had suffered from the Imperialists, the risk of incurring the Emperor's vengeance prevented him from declaring openly for the Swedes. Gustavus Adolphus, who was encamped under the walls of the town, summoned the city to receive a Swedish garrison. Bogislaus appeared in person in the camp of Gustavus, to deprecate this condition. "I come to you," said Gustavus, "not as an enemy but a friend. I wage 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.