Explanation: After WW2, Norway, using a very dubious interpretation of international law, forced German PoWs to disarm the minefields that the Nazis themselves had laid down in Norway - a very dangerous task. This was pretty well illegal, but none of the Allies after WW2 had the motivation left in them to quarrel over international law with a member of the coalition who had spent years under Nazi occupation. Hundreds of German PoWs died, and thousands were injured.
Denmark would also use German PoWs to clear minefields, but by a negotiated surrender agreement, and using German PoWs with pre-existing demining experience, which is a bit less objectionable, but still illegal under international law.