July 11, 1864 – Lieutenant General Jubal Early’s Confederate Army of the Valley spread panic throughout Washington by reaching the capital’s suburbs and attacking a
Robert E. Lee’s Confederate Army of Northern Virginia began crossing the Potomac River into Maryland to take the war to the North for the first time.
September 28, 1861 – Federals advanced on Munson’s Hill, a few miles southwest of Washington, and discovered that it was not as heavily defended as
Letter from Maj. Sullivan Ballou, 2nd Rhode Island Infantry, to his wife.
June 24, 1861 – Professor Thaddeus S.C. Lowe ascended in a balloon to demonstrate the usefulness of aerial military reconnaissance, and J.D. Mills demonstrated the
May 1, 1865 – President Andrew Johnson appointed “nine competent military officers” to form a commission and try suspects accused of conspiring to assassinate Abraham