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.
Construction of Arlington Memorial Bridge
Arlington Memorial Bridge was informally dedicated in January 1932. Grant and members of the Arlington Memorial Bridge Commission inspected the bridge on January 14. On January 16, President Hoover, First Lady Lou Henry Hoover, and members of the AMBC, CFA, NCPPC, and D.C. office of the Army Corps of Engineers informally dedicated the bridge by driving over its length. Although only one lane in each direction was open, the caravan of 12 automobiles traveled from the White House to the bridge, and then across the bridge to the entrance of Arlington National Cemetery and back again. The same day, the George Washington Memorial Parkway opened to traffic.