1200's Mongols were Nomads.. He lead the Mongolian Empire, which was/got huge.. he was known as ruthless...
He/they invaded Japan too, so that is why I wondered about sail/coast... but, everything else was inland I think...
My Ghenghis Khan knowledge ends there..lol But D1 is a bottomless vessel of knowledge
I think I had bear on the brain from Russia being known as the bear..