Hans Georg von Arnim-Boitzenburg

Johann or Hans Georg von Arnim-Boitzenburg (1583 Boitzenburger Land - April 28, 1641 Dresden) was a German general. At different times during the Thirty Years' War, he was a Field Marshal for the Holy Roman Empire and Field Marshal for its opponent the Electorate of Saxony. He also pursued various diplomatic tasks.

Arnim was born in Boitzenburger Land, Brandenburg. After studies at Frankfurt (Oder), Leipzig, and , he entered into service at the Prussian court at Königsberg in 1612, a post he had to leave the next year because of a duel. He aided the Swedish army under Gustavus Adolphus against Russia from 1613 to 1617. During a number of years he was sent on secret mission between Gustav Adolph of Sweden and the Elector of Brandenburg to arrange the marriage to Maria Eleonora of Brandenburg, then 1621-22 with his German regiment aided the king of Poland-Lithuania in action against the Ottoman Empire.

In 1626, although a Protestant, he was persuaded by Wallenstein to enter into the army of the Holy Roman Empire. he quickly rose to the rank of field marshal, and won the esteem of his soldiers as well as that of his commander, whose close friend and faithful ally he became. This attachment to Wallenstein, and a spirit of religious toleration, were the leading motives of a strange career of military and political inconstancy.

...
Wikipedia