Von Kruse organized the military of the state of Nassau during the Napoleonic Wars .
Von Kruse participated in the lengthy French campaign in the Iberian Peninsula ; under secret orders from his Duke , he switched sides in 1814 , and fought against the French in northern Europe .
von Kruse organized the military of the state of Nassau during the Napoleonic Wars , and participated in the lengthy French campaign in the Iberian Peninsula ; under secret orders from his Duke , he switched sides in 1814 , and fought against the French in northern Europe .