Passage: When the revolutionary upsurge revived in the spring of 1849, the uprisings started in Elberfeld in the Rhineland on May 6, 1849.  However, the uprisings soon spread to the state of Baden, when a riot broke out in Karlsruhe.  The state of Baden and the Palatinate (then part of the Kingdom of Bavaria) were separated only by the Rhine.  The uprising in Baden and the Palatinate took place largely in the Rhine Valley along their mutual border, and are considered aspects of the same movement. In May 1849, the Grand Duke was forced to leave Karlsruhe, Baden and seek help from Prussia.  Provisional governments were declared in both the Palatinate and Baden. In Baden conditions for the provisional government were ideal: the public and army were both strongly in support of constitutional change and democratic reform in the government. The army  strongly supported the demands for a constitution; the state had amply supplied arsenals, and a full exchequer. The Palatinate did not have the same conditions.The Palatinate traditionally contained more upper-class citizens than other areas of Germany, and they resisted the revolutionary changes.  In the Palatinate, the army did not support the revolution, and it was not well supplied.   When the insurrectionary government took over in the Palatinate, they did not find a fully organized state or a full exchequer. Arms in the Palatinate were limited to privately held muskets, rifles and sporting guns.  The provisional government of the Palatinate sent agents to France and Belgium to purchase arms but they were unsuccessful. France banned sales and export of arms to either Baden or the Palatinate.

Question: Where did a riot ensue?
Karlsruhe