William Henry Powell was an American soldier who fought for the Union in the American Civil War. He was a leader in the iron and nail business before the war, and his leadership abilities proved useful in the military. Powell began as a captain, and quickly ascended to higher roles in the cavalry, including commanding a regiment, a brigade, and then a division. Powell was awarded his country's highest award for bravery during combat, the Medal of Honor, for heroism at Sinking Creek, Virginia, when, as leader of a group of 22 men, he captured an enemy camp and took over 100 prisoners. This was accomplished without the loss of any of his men on November 26, 1862. He was honored with the award on July 22, 1890.

The Third Battle of Winchester, also known as the Battle of Opequon or Battle of Opequon Creek, was an American Civil War battle fought near Winchester, Virginia, on September 19, 1864. Union Army Major General Philip Sheridan defeated Confederate Army Lieutenant General Jubal Early in one of the largest, bloodiest, and most important battles in the Shenandoah Valley. Among the 5,000 Union casualties were one general killed and three wounded. The casualty rate for the Confederates was high: about 4,000 of 15,500. Two Confederate generals were killed and four were wounded. Participants in the battle included two future presidents of the United States, two future governors of Virginia, a former vice president of the United States, and a colonel whose grandson, George S. Patton became a famous general in World War II.