Imagine your car. Now consider the amount of gas that it requires to keep it running. Picture that your car is in the middle of rural, untamed Nebraska: there are no gas stations for miles. Multiply your car into several hundred cars, and imagine you must organize a large group of men to drive them. You will be doing your best to chase down and capture men driving another group of cars. These other men know the landscape, and their cars run on grass instead of gasoline. What’s more, their drivers hate you, and attack any gas stations that you don’t guard.
At left is a tractor in Ogallala, Neb., 1918. NSHS RG0716-34-5