This was done for the Origins Game Fair convention program, specifically for the section on the War College, a series of talks revolving around wars, both real and imagined. It is, of course, based on the iconic painting by Emanuel Leutze. The theme for the 2012 Origins convention is "time travel," which explains the presence of the U.S. Army Ranger on the boat. I'm sure that won't cause any problems with the timeline whatsoever... Paradox? We're the Special Forces, Son! Paradox can suck it. Hooah!
The original painting by Emanuel Leutze, 1875: [link]
Preliminary sketch and my contributions for 2011 and 2013.