To get his products to market, Armour followed the lead of rivals George Hammond and Gustavus Swift when he established the Armour Refrigerator Line in 1883. Armour's endeavor soon became the largest private refrigerator car fleet in America. By 1900, the company listed over 12,000 units on its roster (one-third of all the privately owned cars in the country), all built in Armour's own car plant.
One of the Armour Car Lines' subsidiaries was dedicated to produce hauling. In 1919 the Federal Trade Commission ordered the company's sale for antitrust reasons. On March 18 of the following year the new entity, to be known as Fruit Growers Express (FGE), would take with it 4,280 pieces of rolling stock, repairs shops at Alexandria, Virginia and Jacksonville, Florida, and numerous ice plants and other facilities scattered throughout the East Coast.
- The Great Yellow Fleet, p. 16.
- White, John W. (1986). The Great Yellow Fleet. Golden West Books, San Marino, CA. ISBN 0-87095-091-6.
- White, John H. Jr. (1993). The American Railroad Freight Car: From the Wood-Car Era to the Coming of Steel. Baltimore: Johns Hopkins University Press. ISBN 0-8018-4404-5. OCLC 26130632.