Battle of Little Bighorn
Click on the image itself to see close-ups of the battle.
This is the final battle between the Homo-Colorid of Planet Artist and the robots of Earth-Mart. The Homo-Colorid decided not to cooperate with their "commercialization"*, and rebelled. The military has successfully lured the male Colorid into this decisive final battle, making it appear as if the Colorid were winning. The commmanding bot followed through with his programmed mission and called in an airstrike directly on his position as the Colorid enemy converged on it.
*Commercialization of the Colorid involves their use in "paint" products back on Earth-Mart. They are entirely made up of pure pigments and thus a great source for painting products when melted down and processed.