How was a ‘lookout’ defined? There were no clear definitions, it would be someone standing outside at night and watching, from the house.
Did he have to be seen holding a telephone or binoculars? It was enough for him to be seen standing. If it’s a lookout, he’s no friend of ours, so we take him down.
What about rules of engagement (open-fire regulations)? It depends on the kind of activity. Obviously, if it’s a quiet activity, where you have to go in quietly and arrest someone, you don’t shoot. It’s up to the battalion commander or his front command team to decide.
But it can reach a stage of shooting to kill? Yes. That happened.