[Alex van de Wetering]

There is a stack of cylinders to the right and a small sign set up in front of the trailers and the cylinders. What could it have been used for? Is it artillery related, like for filling recuperators (seeing some Mack NM artillery tractors parked next to it)?

Hanno, I think you could be right that they are indeed for filling recuperators. For a moment I though they might be rockets for the land mattress, but on closer inspection they do look more like gas cilinders.