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.
18th Century
French Unforms 56BC to 1806
For a terrific collection of color plates of French military costume from the Gauls to 1806, visit The New York Public Library digital galleries.
Uniforms of Russia 960 – 1900
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.
British Uniforms 1066 – 1900
The New York Public Library’s digital holdings have an amazing collection of color plates of British uniforms from 1066 – 1900. These are great painting guides.
The Indian Mutiny Page
One of the first historical wargames I saw was of the Indian Mutiny. Here’s a page with a great deal of background on the event. Black Hole of Calcutta, anyone?