The thought of enlisting in the French Foreign Legion held a tantalizing allure for young nineteenth-century American boys in search of adventure. Born in Bridgeport, Connecticut, James O'Neill enlisted in the legion in 1887, at the age of twenty-seven. In 1890, deployed to Tonquin in French Indochina (more familiar today as Tonkin, Vietnam), O'Neill faced tropical heat, infectious disease, and sudden death. Like his contemporary Stephen Crane,...