The War That Made Germany Prussian - Austro-Prussian War 1866

After settling the Schleswig-Holstein question in 1864, Austria and Prussia are uneasy allies. Both are the biggest players in the German confederation. In Bismarck's dream of a united Germany, he sees Prussia as the only leader and wants to force the so called "small German solution" without Austria. And so, in 1866 a war between Austria and Prussia (plus other German states like Bavaria, Baden, Württemberg, Saxony, Hanover) breaks out to settle this question once and for all.