[1] Due to the strong influence of France on the court of Baden, Charles was forced to marry Emperor Napoléon I's adopted daughter, Stéphanie de Beauharnais, in Paris on 8 April 1806, this despite his own protests and those of his mother and sisters.

[1] On 4 October 1817, as neither he nor the other sons from his grandfather's first marriage had surviving male descendants, Charles confirmed the succession rights of his half-uncles from the Hochberg morganatic line, granting each the title, Prince and Margrave of Baden, and the style of Highness.

He asked the princely congress in Aachen on 20 November 1818, just weeks before his death, to confirm the succession rights of the sons of Louise Caroline, Countess of Hochberg, morganatic second wife of Grand Duke Charles Frederick.

The Congress of Vienna had, in 1815, recognised the eventual claims of Austria and Bavaria to parts of Baden which it allocated to Charles Frederick in the Upper Palatinate and the Breisgau, anticipating that upon his imminent demise those lands would cease to be part of the Grand Duchy.

Since Kaspar was unmarried and childless when stabbed to death in 1833 his heavily disputed claim reunited with the actual succession then held by Leopold, Grand Duke of Baden, since Louis I also died unmarried and childless three years earlier.