AMAN

1220s China: Chinese military observers document the Mongol invasion with genuine confusion. Mongol warriors: Eat only meat, milk, yogurt, fermented mare's milk. No fires needed. No supply trains. March for days on dried meat and kumis. Jurched soldiers: Eat gruel made from millet, wheat, rice. Need constant resupply. Need fires. Need regular meals. Chinese military records: "The Mongols survive on provisions that would starve our men within days." The physical comparison was devastating: Mongol cavalry: Strong bones, perfect teeth, exceptional endurance, disease-resistant, fight effectively after days without sleep. Jurched infantry: Stunted bones, rotted teeth, weak constitution, illness-prone, exhausted after half-day march. Chinese historian's documented conclusion: "The grain diet of the peasant warriors leaves them weak and prone to disease. The Mongols consume meat and dairy constantly, giving them strong teeth and bones our soldiers cannot match." One army conquered the largest empire in human history. The other ate the food pyramid and lost. The Chinese documented their own defeat and accidentally explained why: their soldiers were raised on grain while facing men raised on meat. When your enemy's diet makes them physically superior, you don't just lose through tactics. You also lose through biology.