The New York Public Library’s Digital Gallery has color plates of German military uniforms dating from 1740 – 1900. These include the uniforms of German states such as Anhalt, Bavaria, Saxony, Hamburg, Hessen, Prussia, Nurnburg, Saxe-Weimar, Wurtemburg, and Westphalia.
For a terrific collection of color plates of French military costume from the Gauls to 1806, visit The New York Public Library digital galleries.
The New York Public Library Images collection has an amazing collection of the uniforms of Russian armed forces from 960 – 1900. Most are in color. All are useful.
Who needs Osprey Books? The New York Public Library has a gorgeous set of color plates of the uniforms of the Ancient Roman Army.
The Perry’s Heroes Site offers a photographic guide to painting Waffen SS pea dot camo patterns.