On the farm fields of the late 1970s and early 1980s, the stakes had never been higher. The era marked one of the hardest economic environments of the twentieth century, and two of the world's toughest competitors were locked in a high-horsepower arms race to create the world's best piece of agricultural equipment.

For John Deere, winning meant maintaining global dominance. For International Harvester, winning...

On the farm fields of the late 1970s and early 1980s, the stakes had never been higher. The era marked one of the hardest economic environments of the twentieth century, and two of the world's toughest competitors were locked in a high-horsepower arms race to create the world's best piece of agricultural equipment.

For John Deere, winning meant maintaining global dominance. For International Harvester, winning would mean survival. For all the other ag equipment makers--well, it was mostly bad news.

In a big money game of poker, the two top makers bet on various new technologies and raced to build the best one first. The new machines were designed and built in secret spaces, then tested in dark pastures and remote corners of the world. They were transported carefully covered under tarps and rail cars . . . all in effort to keep them from the prying eyes and nimble cameras of the competition.

In this rollicking trip back in time, the salesman, engineers, and executives who played the game offer firsthand accounts of how and why this techno-turf war was fought. As the game escalated, one salesman took matters into his own hands. In the name of company loyalty, he crossed a line he shouldn't have and found himself deep in enemy territory.