Statistical Map

Statistical map of Napoleon’s Russian campaign of 1812

The size of Napoleon’s army is shown by the dwindling width of the lines of advance (green) and retreat (gold). The retreat information is correlated with a temperature scale shown along the lower portion of the map. Published by Charles Minard in 1869

http://www.britannica.com/EBchecked/topic-art/219456/70821/Statistical-map-of-Napoleons-Russian-campaign-of-1812-The-size