The story of the four-wheel-drive tractors built by Steiger, International Harvester, Case and Case IH is told in dramatic fashion in this authoritative guide. Starting with the development of early four-wheel-drive systems at International Harvester, the book traces the evolution and design some of the most powerful and capable tractors of the 20th century. The book includes the complete story of Steiger tractors, which were originally built and designed in a garage in Fargo, North Dakota. As the Steiger machines grew to become one of the highest quality high-horsepower machines on the market, International Harvester developed their own line of four-wheel-drive tractors. Case also built a line of low-cost high-power tractors. The book tells the story of each of these players in the industry, and how they all combined under one banner and, together, created one of the current industry-leading technologies, the Quadtrac. Brought to you by the same team that created the award-winning books Red Tractors 1958-2013 and Red Combines 1915-2015, this incredible book is a must-have for any enthusiast for tractors and farming. * All the 4WD models from International Harvester, Case, Steiger, and Case IH are shown.* The book includes the design and development history of the tractors, with first-hand accounts from the engineers and other product-development specialists at IH and Case IH* More than 400 images of IH and Case IH tractors including previously unpublished concept drawings as well as images of prototypes, test mules and more* Information on North American, British, German, Australian, and French models from the leading experts on red four-wheel-drive tractors.