The Trench Destroyer (1917)
This chilling image from the height of World War I appeared on the February, 1917 cover of Hugo Gernsback's The Electrical Experimenter. The excerpt below is from Yesterday's Tomorrows: Past Visions of the American Future by Joseph Corn and Brian Horrigan.
The design of this mobile dreadnaught, with its steel-tired, spoked wheels, suggests that its inventor may have been influenced by agricultural tractors or perhaps an amusement park Ferris wheel. The trench destroyer also embodies the common goal of military visionaries: maximum offensive power with total defensive security.