Often hailed as the godfather of today's elite special forces, Robert Rogers trained and led an unorthodox unit of green provincials, raw woodsmen, farmers, and Indian scouts on "impossible" missions in colonial America that are still the stuff of soldiers' legend. The child of marginalized Scots-Irish immigrants, Rogers learned to survive in New England's dark and deadly forests, grasping, as did few others, that a new world required new forms of...

When John Wesley Powell became the first person to navigate the entire Colorado River, through the Grand Canyon, he completed what Lewis and Clark had begun nearly 70 years earlier--the final exploration of continental America. The son of an abolitionist preacher, a Civil War hero (who lost an arm at Shiloh), and a passionate naturalist and geologist, in 1869 Powell tackled the vast and dangerous gorge carved by the Colorado River and known today...