Maximilian II responded also to the demands of the people for a united German state, by attending the Frankfurt Assembly which intended to create such a state. The progress of the 1848 Revolution, however, gave him pause. The king strenuously opposed the unionist plans of the Frankfurt Parliament, refused to recognize the imperial constitution devised by it, and assisted Austria in restoring the federal diet and in carrying out the federal execution in Hesse-Kassel and Holstein. In the aftermath of the failure of the Frankfurt Assembly, Prussia and Austria continued to debate of which monarchy had the inherent right to rule Germany. The dispute between Austria and the Electoral Prince of Hesse-Kassel (or Hesse-Cassel) was used by Austria and its allies (including Bavaria) to promote the isolation of Prussia in German political affairs. This diplomatic insult almost led to war when Austria, Bavaria and other allies moved troops through Bavaria towards Hesse-Kassel in 1850. However, the Prussian army backed down and accepted the principle of dual leadership. This event was known as the Punctation of Olmütz but also known as the "Humiliation of Olmütz" by Prussia. This event solidified the Bavarian kingdom's alliance with Austria against Prussia.