The Steiger Tractor Company was born in 1957 when John Steiger, along with his sons Douglas and Maurice, built a tractor in their dairy barn. Weighing 15,000 pounds and powered by a 238 horsepower Detriot Diesel engine, this tractor was designed to meet the need for a high horsepower tractor that was not being met by the major manufacturers of the time. The tractor proved successful, and soon the Steigers were building more tractors on their farm. By 1969, 126 tractors had been built on the farm when Steiger incorporated and moved into a new factory in Fargo, North Dakota. Steiger grew steadily until the early 1980s, when a struggling farm economy forced the company into bankruptcy. In 1986, Steiger was purchased by Tenneco, the parent of Case-International. Steiger built tractors under both brands, and both red and green paint schemes, until 1990 when the green Steiger brand was dropped (although it returned in 1995 on red Case-IH tractors).
Today, Steiger tractors live on in the STX series four-wheel drive tractors from Case. The Steiger family still operates Steiger Manufacturing, building Toreq scrapers.
CaseIH - official site
Steiger history - article at Big Tractor Power