Bavarian infantry 1866

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See more on the Austro-Prussian war here

Bavarians

Königgrätz 1866: the Epic Climax of the Austro-Prussian War

Article on wargaming the battle. 

Pendraken 10mm Europe 19thc

This looks very useful for 1866 if you are of a mind to go small. 1860s Bavarians, Hanoverians and all the rest. Here

THE UNIFORMS OF Bismarck's Wars The Second Schleswig War & The Seven Weeks War

Here
New label Bavaria

Langensalza 1866

This is an interesting conflict part of the wider wars of 1866. Wiki
I have a new label Hannover for more on this war. Uniforms of 1866

Langensalza e-book

Here for more