How would a 19th Century violation of Belgium´s guarantered neutrality effect the war and peace on the continent? Would England intervene and declare war at all costs ? Would England bring troops to Flanders ? Maybe an 1848 successful revolution leads to a German Empire, which Great Britain sees as an illegitimate threat and declares war. The Germans than invade Belgium . Otherwise an alternate 1870 Schlieffenplan like scenario maybe ? Maybe France has strong fortifications on the Rhein, so the Prussians try to invade France from Belgium ?