As Orko’s OP asks, Prussia’s position within the German world and that non-Prussian German world’s opinion of Prussia could both cause Prussia to conceive of herself as much more mainly Prussian rather than superficially German which could be an ambiguous category. The whole
Großdeutsche or Kleindeutschland solution showed how complicated this issue was
If you want to kick Prussia out of those places after 1815, the sole options are either a successful republican movement in the 1848/49 revolutions in most of Germany, including the Rhineland and Westphalia
I can think of two, rather remote, possibilities (key word here is REMOTE) based on what Iserlohn has mentioned. And both possibilities come about because King Frederick Wilhelm IV of Prussia refused the offer of a crown of a united Germany from the
Frankfurt Parliament in 1849 saying he would not accept “a crown from the gutter”. Earlier Austria had refused to go along with any plans of the Frankfurt Parliament.
But what if another German king were willing to take this crown after Prussia’s refusal and try to unite Germany, excluding Prussia and Austria ? In 1848 – 1849, a majority of Germans were aflame with a desire for a united Germany and their revolts had already forced many concessions from the rulers in Prussia, Austria and the rest of the German states.
One candidate could be the new King of Bavaria,
Maximilian II. Bavaria long sought to play a middle role between Prussia and Austria and it would not be the first time Bavaria had snatched the crown of an Emperor. There was the earlier example of
Duke Charles Albert of Bavaria who became the Holy Roman Emperor Charles VII from 1742 to 1745 during the War of the Austrian Succession. Why not again ? If Prussia continued to stand aloof, this would only emphasize her “Prussianness” over her “Germanness”.
A second candidate could be King
Ernest Augustus of Hanover. Not only does he have a strong link with Great Britain (Queen Victoria was his niece, although they were estranged ) but the existing British government was favorable to Prussia leading a united Germany. They would probably also be amenable to a (essentially) British ruler of Hanover (a country closely associated with Great Britain from 1714 to 1837) becoming the leader of a united Germany.
King Ernest Augustus also had the
Steuerverein, a Hanover-led economic rival to Prussia’s
Zollverein. His acceptance of this crown and a possible economic challenge to Prussia could only reinforce their “Prussianness” over their common “Germanness”.
Being on the opposite of issues would only emphasize Prussia’s differences from other Germans. In the later Franco-Prussian War of 1870 – 1871, the Crown Prince Frederick of Prussia wrote in his “The War Diary of Emperor Frederick III” how fighting together against the French brought together all Germans, including Prussians, into thinking as one people. The excitement of the German populace then was definitely echoed by the earlier 1848 – 1849 enthusiasm.
Crown Prince’s Diary said:
“In many ways I deplore the fact that it has fallen to my lot to command the South Germans, an Army little to be depended on.”
“Who would ever before have dreamed that Bavarians and Saxons would greet a Prussian Prince with tumultuous hurrahs specially emphasizing the Unification of our Country.”
“In truth these South Germans gave me just as warm a welcome as we are accustomed to receive in our old Provinces. I felt almost embarrassed in the presence of the King (of Württemberg), who sat beside me in the carriage, for it was manifest these compliments were paid not to him, but to me as representative of the Power that had undertaken the solution of the German question, -- a task the dynasty of Württemberg could hardly be accounted competent to carry through.”
“On the way I visited a Bavarian infantry and cavalry bivouac, taking this opportunity to make acquaintance with the Bavarian soldier. True, the Prussian point of view must be entirely abandoned, for here everything is quite different from what it is with us; clumsiness of build and startling corpulence prevail even in the younger class of levies.
Still the soldier shows quite a smart bearing, only he does not seem accustomed to be addressed by superiors. The way of picketing the horses in bivouac wastes an enormous amount of room.
The men greeted me as if I were one of their own countrymen, in a fashion I have never before found outside Prussia, but indeed I can never again look upon Bavarians and Württembergers as foreigners.”