This map shows Germany and the Habsburg sphere of influence in 1910, in the aftermath of the Second Brothers' War. The PoD is that the July Revolution is averted and Henri V remains King of France. Butterflies lead to Austria and France intervening on behalf of the Sondebund War, which leads to the victory of the Sonderbund and Austria regaining the Habsburg ancestral seat of Habsurg Castle and the town of Habsburg. Austrian performance in the war leads to some army reforms that result in a Habsbueg victory during the Second Italian War of Independence, with Austria keeping Lombardy and Austria and France securing the independence of the other Italian states, and Austrian participation in the Russo-Turkish War that saw Austria fully annex Bosnia and the Sanjak of Novi Pazar. The Austro-Prussian War and the Franco-Prussian War go similiarly to OTL, ending with the formation of Germany in 1870. This state of affairs continues in Europe until around 1904. In that year, strikes erupt across Bavaria, demanding better working conditions, especially of miners and railway workers. The pro-workers' rights conservative government of Bavaria, including the King, enetered into negotiations with the unions, but as negotiations were ongoing, the anti-workers' rights liberal government in Berlin, including the Emperor, ordered Imperial troops to move into Bavaria and put down the strikes. This enraged the Bavarian government and the King mobilised the Bavarian Army as he sent an ultimatum to Berlin to stop the Imperial army. Berlin decided to try and call Munich's bluff and continued moving troops, leading to a Bavarian declaration of independence.
Bavaria gained support in the War of Independence from France, Austria, and the other South German states. France and Austria suffered some initial setbacks in the war, making it seem like it was going to be a repeat of 1867 and 1870. This caused Sardinia, Serbia, Montenegro, and Romania to join the war against Austria and France. Unfortunatley for Germany, France and Austria were able to work out the errors that had caused the setbacks and correct them. The Austro-Franco-Bavarian forces quickly moved into enemy territory, and in a few months, had occupied the whole of their countries. Towards the end of the war, the Dutch, Danes, and Russians also joined in the hopes of getting some territory from Prussia. The resulting peace treaty saw Russia annex much of Prussian Poland, the Danes retake Schleswig-Holstein, and the Dutch gain a chunk of the Prussian Rhineland. France retook Alsace-Lorraine and Austria regained Silesia. The remainder of the German Empire was dissolved, with most of the German states being reset to their 1866 borders. Then the western Prussian territories were divided between Hannover, the Hesses, and Bavaria, and Saxony was mostly restored to its pre-1815 borders. In the Balkans, Montenegro was reduced to its 1852, Belgrade and some of the Serbian okrugs bordering Bosnia along with Oltenia were annexed by Austria, with Montenegro, Serbia, and Romania being reduced to Austrian vassal states. The Kingdom of Sardinia was dismantled, with Sardinia proper being annexed to France along with Savoy and Nice, Austria annexing some territory brining Lombardy to its OTL modern borders in the east, and Genoa being reestablished as an independent state. The remainder of Sardinia became an Austrian vassal as the Principality of Piedmont.