Austria (under a succession of very capable rulers) unifies Germany, resulting in a massive empire stretching from the North Sea to the Adriatic. Britain and Denmark don't like this, so they invade. Prussia, France, and Sweden join Austria, while the Low Countries and Russia join Britain. The British side wins, and divide up Germany into a Danish part, a central part, and a Rhinish part (including an expanded Alsace-Lorraine). Austria keeps its eastern territories, south Germany, and a chunk of Italy. Russia gets Prussia beyond the east side of the map (as well as Gottland), and Denmark gets a chunk of Prussia in OTL Germany. Belgium and the Netherlands get eastern borders that coincidentally correspond to OTL modern borders. Butterflies result in larger Papal States and a disunited Italy. For some reason, France and Austria keep their Mediterranean possessions.