[znt]

Yoghurt + Kefir + Kumis.

Golden Horde conquered the known world fueled by milk byproducts.

[bigiain]

Surely alcohol is by far the biggest example.

[bobxmax]

Aside but I've always hated the phrase "known world". It means "known to the Europeans"

[0_____0]

I think in this instance it means "known to the Mongols"

[dismalaf]

"Known world" in the context of history usually means Eurasia + Africa. Basically all the places that aren't the new world and random islands in the middle of nowhere.