 The Prussian–Austrian duality within the Confederation eventually led to the Austro-Prussian War in 1866.During the war, the southern states allied with Austria adopted the black-red-gold tricolour as their flag, and the 8th German Army Corps also wore black-red-gold armbands.The Kingdom of Prussia and its predominately north German allies defeated Austria and made way for the realisation of the Lesser German solution a few years later.