Altmark Incident

No, it didn't mean anything to me either until we stumbled across a memorial at Jossingfjord today. Briefly, the Altmark was a German supply ship which had 299 British prisoners on board and had been trying to get back to Germany in 1940 by travelling through neutral (at the time) Norwegian waters. The Royal Navy rescued all prisoners and shot 5 escaping Germans. The Norwegian military did not intervene which Hitler decided was a lack of their ability to defend their neutrality and possibly used that as a reason to invade Denmark and Norway. There's a lot more to it than that which you can find out by Googling 'Altmark incident'.

Photo: Today's view down to Jossingfjord (where the attack took place)