sentences:  King Charles IV had been forced by the Spanish people to abdicate in favour of his son Ferdinand VII, and at the time of the uprising both were in the French city of Bayonne at the insistence of Napoleon.An attempt by the French general Joachim Murat to move the daughter and her children along with the youngest son of Charles IV to Bayonne sparked a rebellion.Murat was the brother-in-law of Napoleon, and would later become king of Naples.