No, the Atlanta Civil War scenes were not shot on location.
Atlanta was built on the MGM studio back lot.
Many of the burning buildings were recycled from movies like King Kong (1933), Little Lord Fauntleroy (1936), and The Garden of Allah (1936).
Dore Schary replaced Louis B. Mayer as studio head of MGM in 1951. Schary himself was fired in 1956.
Rambo II did not preced Rambo III (1988). There were three Rambo movies in the 1980s, all starring Sylvester Stallone as John Rambo, but none was called Rambo II. The three films were: First Blood (1982); Rambo: First Blood, Part II (1985); and Rambo III (1988).
Stewart Granger’s real name was James Stewart.
Mary Philbin was Christine Daae, protegee of Erik, the Phantom (Chaney) in The Phantom of the Opera (1925).
Rene Clair directed the first version of And Then There Were None (1945), starring Barry Fitzgerald and Walter Huston. The Agatha Christie story was remade three times, each time as Ten Little Indians: in 1966 (directed by George Pollock), in 1975 (Peter Collinson), and in 1989 (Alan Birkinshaw).
Ava Gardner appeared with the Bowery Boys in Ghosts on the Loose (1943), which also starred Bela Lugosi, Leo Gorcey, and Huntz Hall. Gardner played Huntz Hall’s sister.