I actually watched a documentary partially about the Vikings that, purportedly, made it to what are now the United States of America, (Newfoundland, Canada was also mentioned), I wish I could recall what it was called. What's clear though, is that they travelled far and wide and they influenced many different peoples.
I knew about the stuff in your first paragraph but it's taken time for me to uncover those, and other, things which has been an enjoyable journey. That's the thing about history, in researching one thing many more pop up which is why it's a never-ending thing for me. I don't mind though, it gives me some great ideas on where to travel and what see when I'm there.
I think the Vikings were lateral thinkers who were happy to weigh up something before discounting it or moving on it and that led them to spread range out there and I also think they had the ability to see opportunity, chase it down and pivot if/when required. It would be considered good business strategy these days.
Thanks for commenting.