Nebelwerfer - a German smoke mortar

The Nebelwerfer (smoke mortar) was a World War II German series of weapons. They were initially developed by and assigned to the Wehrmacht's "smoke troops" (Nebeltruppen). This weapon was given its name as a disinformation strategy designed to fool observers from the League of Nations, who were observing any possible infraction of the Treaty of Versailles, into thinking that it was merely a device for creating a smoke screen.
The presented Nebelwerfer crew is displayed by the Museu Mlitar do Porto.