United States v. Lee (1882)
With local cemeteries in Alexandria County and Alexandria filling rapidly with war dead, Quartermaster General of the United States Army Montgomery C. Meigs proposed using of the Arlington estate as a cemetery. The first burial there was made on May 13, 1864. United States Secretary of War Edwin M. Stanton approved the establishment of a military cemetery on June 15, 1864, creating Arlington National Cemetery. By the end of the war in April 1865, more than 16,000 people had been buried at Arlington. In September 1866, a memorial and a burial vault (containing the remains of 2,111 U.S. and Confederate soldiers who died at the First Battle of Bull Run, Second Battle of Bull Run, and along the Rappahannock River) were buried in Lee's former wildflower garden on the mansion's east side beneath the Civil War Unknowns Monument, a memorial to honor unknown soldiers who had died during the American Civil War.
Arlington National Cemetery
George Washington Parke Custis, grandson of Martha Washington and adopted son of George Washington, acquired the land that now is Arlington National Cemetery in 1802, and began construction of Arlington House, which was ultimately named after the village of Arlington, Gloucestershire, England, where his family was originally from. The estate passed to Custis' daughter, Mary Anna, who had married United States Army officer Robert E. Lee. Custis' will gave a "life inheritance" to Mary Lee, allowing her to live at and run Arlington Estate for the rest of her life but not enabling her to sell any portion of it. Upon her death, the Arlington estate passed to her eldest son, George Washington Custis Lee.