The 1860s brought war to the doorsteps of many Americans, but none as literally as Wilmer McLean, who witnessed the beginning and end of the Civil War from his own home. McLean and his wife, Virginia Mason, moved to Manassas, Virginia, in 1853, shortly after their wedding. A few years later, the couple was surprised when Confederate General P.G.T. Beauregard commandeered their property to serve as his headquarters ahead of the first major land battle of the Civil War…