In early summer of 1990, Joel Turnipseed was homeless--kicked out of his college's philosophy program, dumped by his girlfriend. He had been AWOL from his Marine Corps Reserve unit for more than three months, spending his days hanging out in coffee shops reading Plato and Thoreau.

Then Saddam Hussein invaded Kuwait.

Turnipseed's unit was activated for service in Operation Desert Shield. By January of '91, he was in Saudi Arabia driving tractor-trailers for the Sixth Motor Transport Battalion--the legendary "Baghdad Express." The greatest logistical operation in Marine...