By 1870, the remains of nearly 300,000 Union dead had been buried in 73 national cemeteries, located mostly in the South, near the battlefields. The most famous are the Gettysburg National Cemetery in Pennsylvania and the Arlington National Cemetery, near Washington. | By 1870, the remains of nearly 300,000 Union dead had been buried in 73 national cemeteries, located mostly in the South, near the battlefields. The most famous are the Gettysburg National Cemetery in Pennsylvania and the Arlington National Cemetery, near Washington. |