An army may travel on its stomach, but Genghis Khan’s army milked what they rode on, then fermented it in bags. Airag was high in nutritional value and packed a 2% alcohol content after they away threw the butter solids, which seems like an egregious oversight considering what we all know about butter in here.
If you want culinary proof, missionaries loved the stuff, commenting, "it leaves a taste of milk of almonds on the tongue, and it makes the inner man most joyful and also intoxicates weak heads, and greatly provokes urine.”
If that ain’t an army recruitment poster, I don’t know what is.