Union General Philip Kearny began his career as a lieutenant with the 1st U.S. Dragoons. He studied cavalry tactics in France and fought with the Chasseurs d'Afrique in Algeria, where his fearlessness earned him the nickname "Kearny le Magnifique." Returning to America, he wrote a cavalry manual for the U.S. Army and later raised a troop of dragoons--using his own money to buy 120 matching dapple-gray mounts for his men--and led them during the Mexican War, where he lost an arm. This biography chronicles the military life of one of the most talented field officers in the Army of the Potomac at the outbreak of the Civil War, who famously led a charge at the Battle of Williamsburg with his reins in his teeth, and sometimes disobeyed General George McClellan, once protesting an order to retreat as "prompted by cowardice or treason." Kearny was on the verge of higher command when he was killed at the 1862 Battle of Chantilly.