Yep. If you were going to do a raid/piracy, you would have said "I'm going a viking", or "Im going a plundering". And settlements not under your control were r

Yep. If you were going to do a raid/piracy, you would have said "I'm going a viking", or "Im going a plundering". And settlements not under your control were ripe targets for that - they were on YOUR territory. And having been in a proper Norse longboat, those things are nigh silent. And seeing 50 of them land on the shore at early morning fog, would be terrifying.