well-known surprise attacks ?
I can't make up the sense of "well-known surprise attacks :)
Context:
Historically, Sweden has an interesting story. Its dealings with the outside world began, in fact, during Viking times, when in addition to the well- known surprise attacks of the nearby lands, there was much trading around the Baltic, mostly in furs and weapons. Swedish connections with the other Scandinavian countries, Norway and Denmark, have been strong since the Middle Ages. The monarchies of all three are still closely linked.
Thanks a lot.