In 1847 General Winfield Scott boldly led a small but undaunted army from the Mexican coast all the way to the Halls of Montezuma, routing Mexican forces at every turn while pacifying the countryside. Scott's military campaign--America's first ever in a foreign country--helped pave the way for victory in the wider war against Mexico and also posed new challenges for discipline, logistics, and the treatment of civilians. Yet it has remained largely neglected by historians.

In this first book-length study of Scott's brilliant six-month campaign, Timothy Johnson shows how Scott overcame such...