So Vikings are wreaking havoc during these dark ages for two or three hundred year time period on these Christian communities taking all their great stuff and bringing it back to the Scandinavian countries and that's going to make them expert tradesmen because a silver cross doesn't do you very well unless you trade it for something even better. So they're taking their silver, they're taking their gold, they're taking their men, they're taking their women, they're taking their children for the slave market and they're doing really good at it. Some Vikings were even too terrible for even the other Vikings. One of those Vikings in the late 900s was called Eric the Red. Eric the Red was exiled. They kicked him out of Iceland and Denmark. They said, we don't want you.