In the aftermath of the failure of the Frankfurt Assembly, Prussia and Austria continued to debate over which monarchy had the inherent right to rule Germany. A dispute between Austria and the Prince of Hesse-Kassel 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, Prussia backed down to Austria, and accepted 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. When the project to unite the German middle-sized powers under Bavarian leadership against Prussia and Austria (the so-called "Trias") failed, Minister-President Von der Pfordten resigned in 1859. Attempts by Prussia to reorganize the loose and un-led German Confederation were opposed by Bavaria and Austria, with Bavaria taking part in its own discussions with Austria and other allies in 1863, in Frankfurt, without Prussia and its allies attending.