Via Kambiz I found this post which argues that the high-protein diet of the Mongols was important in allowing them to defeat their enemies, who were relatively nutritionally deficient. Perhaps. But history isn’t that simple, after all, if “more meat = more ass-kicking,” you wouldn’t have predicated that the grain-fed Roman soldiers would be able to cut a scythe through meat & milk gorging Celts and Germans, would you? How did those ancient Italians defeat the northerners? If you read about the suppression of the rebellion of Boudicca and how outnumbered Roman infantry formed a testudo simply turned into a Celtic meat grinder you’ll see that man can fight and win by bread and water alone!
Judges 9:45 And Abimelech fought against the city all that day; and he took the city, and slew the people that was therein, and beat down the city, and sowed it with salt.