1630-1634...

In autumn of 1629, Gustavus Adolphus declared that the emperor wished to conquer Sweden and the Baltic and that he wanted to prevent them from doing so. He landed on the German coast of Pomerania on 6 June, 1630, but was not welcomed even by the Protestants. He was obliged to go it alone and soon ran out of funds. Wallenstein could have killed him but because of the reduction in his army, had disbanded the forces that had once guarded the area they were in. However, his only real allies were the French, who subsidized his army. After a Swedish city, Magdeburg, was destroyed by Tilly's Imperial army, the Protestants began to arm in case of attack.

Gustavus used this distraction to seize the fortresses of Frankfort, Landsberg, and Spandau.

When the Imperial forced moved against Saxony, the Elector of Saxony (who had once been part of the Imperials, and had formed a temporay alliance with Gustavus) basically abandoned the Swedish army. Then the Swedes met the Imperials at Breitenfield and annihilated them, and promptly conquered most of southwest Germany. The Emperor was forced to recall Wallenstein.

Wallensteins army met the Swedes met at L�tzen. The battle went in favour of the Swedes, but Gustav was killed. Wallenstein was also killed; however his death was ordered by the Emperor who feared his growing power. The Imperial and Spanish armies later united and crushed the Swedes at N�rdlingen. All Swedish gains were lost.