Gustavus II (Gustavus Adolphus) of Sweden now came into the war. Sweden joined the war properly in 1630 and Swedish forces remained in Germany to the end of the war. âLion of the Northâ Gustavus Adolphus and the Thirty Yearsâ War: Victories and Downfall â Part II This is the recounting of the dramatic life of the âThe Golden Kingâ and âThe Lion of the Northâ Gustav Adolf, and the Swedish Empire during stormaktstiden â âthe Great Power eraâ. The Results of Adolphus' Innovations: The Battle of Breitenfield Gustavus Adolphus of Sweden entered the Thirty Years War allied with the Protestant cause. Gustavus Adolphus built upon the innovations of Maurice of Nassau, and simplified logistics by standardizing his armyâs artillery and muskets. Sweden would remain in conflict until the Peace of Prague treaty in 1635. Gustavus AdolphusThe king of Sweden from 1611 to 1632, credited with founding the Swedish Empire, who led Sweden to military supremacy during the Thirty Yearsâ War. Moved also by his Protestantism, â¦ That made Sweden the premier military force during the Thirty Years War (1618 â 1648), and revolutionized warfare by creating a model that would be emulated by military commanders for hundreds of years. From the time of his birth until his coronation, his upbringing involved many lessons in politics, literature, military science, and â¦ Gustavus Adolphus saw himself as the protector of Protestantism in Germany and if north Germany was safe then so was Sweden. Gustavus Adolphus was the main figure responsible for the success of Swedish arms during the Thirty Years' War and led his nation to great prestige. PomeraniaA region on the southern shore of the Baltic Sea in Central Europe, split between Germany and Poland. Gustavus Adolphus was an accomplished soldier and with the help of Catholic France, he freed himself from the war against Poland with the Treaty of Altmark of September 1629. He established lines of communication and supply with his native Sweden and moved across the Baltic Sea and into the heart of â¦ More broadly, the duel between Swedish and Imperial forces has become the defining conflict of the war, with the twelve years that preceded it being relegated to the background. âLion of the Northâ Gustavus Adolphus and the Thirty Yearsâ War: Fighting the Holy Roman Empire â Part I On 9 December 1594, Gustav II Adolf was born. Born on December 9, 1594, Gustavus Adolphus had taken full part in Swedish affairs and had helped lead the armies of his father, Karl IX. His territorial ambitions had embroiled him in wars with Poland, and he feared that Ferdinand's maritime designs might threaten Sweden's mastery of the Baltic. The Role of Sweden in the Thirty Yearsâ War The brief, brilliant campaigns of Gustavus Adolphus dominate the history of the Thirty Yearsâ War for many. Look for more information regarding Sweden in the Thirty Years War in the upcoming Strategy & Tactics issue #301 article âGustavus Adolphusâ and join the conversation on Facebook ! Thirty Yearsâ War was fought in Central Europe from year 1618 to 1648. From Sweden, King Gustavus II Adolphus had viewed with apprehension the Catholic expansion in Germany, especially along the coast of the Baltic, which he aspired to make a Swedish lake.