The Machine Gunners (シーズン 1)

During the Second World War, a group of youth in the Northeast England town of Garmouth regularly suffer from bomb attacks by the German forces. One of the children raids a crashed German aircraft and takes a fully operational machine gun, intending to set up their own fortress. Playing with it causes a German plane to crash-land; the kids befriend the pilot, who is unaware that they had caused him to crash.