Sweden Bohemian Estates Protestant Union Denmark Landgraviate of Hesse-Kassel
Rank
General-Lieutenant
Battles/wars
Ingrian War
Polish–Swedish War (1600–29)
Thirty Years' War
Battle of White Mountain
Battle of Lutter
Siege of Dorsten
Battle of Nördlingen (1645)
Battle of Wevelinghoven
Hessian War
Johann von Geyso (1593 – 1661) was a German nobleman and General-Lieutenant, who fought during the course of the Thirty Years' War. After studying in a Dutch military academy, Geyso fought as a mercenary in the armies of Sweden, Bohemia, Denmark and the German Protestant Union. In 1628, having gained significant experience in warfare he returned to his native Hesse-Kassel which he served until the end of the Thirty Years' War, reaching the rank of commander in chief of the Langraviate's forces and becoming ennobled.
JohannvonGeyso (1593 – 1661) was a German nobleman and General-Lieutenant, who fought during the course of the Thirty Years' War. After studying in a...
supreme commander of the Hessian forces. As the command was given to JohannvonGeyso instead, Rabenhaupt retired from active service. After dedicating many...
sources cite the Julian date of 4 June. The Hessians under General JohannvonGeyso were stationed in Neuss as an occupying power. To the south, on the...
Hessian defenders were commanded by senior commander (Oberkommandant) JohannvonGeyso and town commander Emmanuel Kotz with 2,000 soldiers, 400 of whom had...
ruling and, at the end of 1645, sent her battle-hardened troops led by JohannvonGeyso towards Marburg. After a short siege of Marburg and Butzbach and their...
Global Information
Sweden 
Bohemian Estates 
Denmark 
Landgraviate of Hesse-Kassel