It's fun to speculate about alternate history. What if after the Great War it was High Rock that decided that the Empire was a one-sided deal and seceded from the Union and not Skyrim? an HRexit if you will. Lets say that after the GW the leaders of High Rock decided that the Empire was to corrupt and bureaucratic and wouldn't allow enough Breton influence on the day to day politics so they decide to secede to gain control over their laws and resources. There is also a growing sympathy for the Aldmer and maybe even the return of the Direnni as a political force.
Would every High Rock kingdom agree to leave the Empire?
Would it result in a war the same as it did in Skyrim?
If so what kind of war and who would win?
Would a breakaway High Rock make it more or ess likely for other nations to break away?