Banner of the Russian Armed Forces
Today's research actually focuses on the Imperial Russian Army, 1721-1917, rather than the modern army. This is the army of War and Peace, founded by Peter the Great and destroyed by WWI and the Russian Revolution.
Russian dragoons and hussars, 1807 (Lyta and Jasper's time, though well after Midwinter.)
Russian grenadiers and musketeers, 1762, looking very familiar.
Francis Davis Millet's Fifty lashes, from Campaigning with the Cossacks, Harper's magazine, 1887. Discipline in the army was painfully enforced.
The Battle of Friedland, 1807. The Russians lost the battle, but Napoleon lost the war.
(All images courtesy of the Wikipedia.)