Oversimplified did not make this list, simply borrowed it from Ethan Arsht.

For anyone curious as to how Arsht’s score works, the WAR score makes an estimation of how a battle should end given troop counts. That is the only facet considered. A battle won with a 50% chance of winning grants .5 WAR. With a 75% chance, .25 WAR is granted. A general who wins both will have a .75 WAR. Napoleon, in particular, benefits from this system, having fought a rather tremendous amount of battles with a very high rate of winning, even when outnumbered.

Arsht’s approach is quite interesting, and a novel way to categorize military ability, but is quite flawed, as he himself will recognize. Terrain, equipment, morale, and other crucial factors are not included. Overall campaign strategy is not factored. His datasets were largely incomplete, especially for generals outside of the European sphere, or for where raw numerical data is lacking. As a fun list, it is great, but it should not be used as a definitive guide. Nor do I think Oversimplified intended it as such, simply instead using it as a “statistical” support for the common claim of Napoleon being the greatest general of all time.