Denmark punked out of The Great War, and so missed out on the Great Debut of two of modern technology's Great Weapons of Mass Death and Misery from the air: bombing of cities, and clouds of poison gas. Sniffing out the profit potential from Denmark's movie fans who'd pay to get a taste of that action in their own hoods (safely), Nordisk's exploitation film division went into overdrive and came up with a winner and released it on April Fool's Day. Grounded in an engaging story of class and family struggle with a healthy dose of hiss-worthy villainy, executed with strong performances (aided by authenticity of masses of nonprofessionals), and crowned with credible special effects and stunning cinematography revealed in this excellent restoration, this deserves greater recognition.