Originally posted by ScreamPaste
The golden horde stands out historically for moving astoundingly far West, something I don't think has ever been replicated.
That's more of a matter of desire than it is a matter of ability. Also, what Ares said. I don't think the Mongols ever expanded farther west than Romans did. It's just more important for the Mongols because they were farther away.
But Alexander made it to India, which is just as impressive.