Someone took sabermetrics and applied it to generals and their success at warfare. Napoleon is currently the most successful by far with Caesar being a distant 2nd. The author left out a good deal of the Mongols conquests, so hopefully the data gets updated soon. Zhukov seems to be the best modern general in the data set. Unsurprisingly, Robert E. Lee, Patton, and Rommel are all vastly overrated.
Here's a link to a visualization https://ethanarsht.github.io/military_rankings/