After the Battle of Brienne, 29 January 1814, Napoleon was nearly taken by the Cossacks. French general Gourgaud saved the life of the Emperor by killing a cossack who tried to transpierce him with his lance.
"The Career of Napoleon, who was advancing to enter the town, was nearly cut short by a Cossack, one of a band who had dashed unawares upon the Emperor's staff, and, singling him" out, charged him with his lance in rest, and was only arrested by a bullet from the pistol of Gourgaud, which brought the daring lancer to the ground.—' Bourrienne's Memoirs'"
A dynamic work showing Napoleon mounted on his favourite horse Marengo, under a surprise attack from Russian Cossacks.
Other works by same artist: http://www.wikigallery.org/wiki/artist45612/Robert-Alexander-Hillingford/page-1