War of 1812 Mod is a Multiplayer mod for Napoleonic Wars a DLC for Mount and Blade Warband.
Those old screenshots are very well old. Here is a current preview instead. 1st U.S. Infantry Regiment Ranker. An example of the early-late war uniforms feature of the mod. This screenshot was taken with the 'Use High-contrast Tonemap' ticked to be on and with Low HDR mode. Under the in-game Options menu under the Video Options tab.
Notice his shako is from the early war period of 1812-1813. The uniform regulations changed the torso pattern as well soon after. The pants are white in early war configuration. Finally, his Charleville musket has no bayonet fixed, yet. In the background is the map of Chippewa in-game.