Frank Parish Conroy (14 October 1890 – 24 February 1964) was a British film and stage actor who appeared in many films, notably "Grand Hotel" (1932), "The Little Minister" (1934) and "The Ox-Bow Incident" (1943).
 He appeared on the Broadway stage and won a Tony Award for his performance in Graham Greene's "The Potting Shed" (1957).
Canyon Passage is a 1946 Technicolor Western film directed by Jacques Tourneur and set in frontier Oregon.
 It starred Dana Andrews, Susan Hayward and Brian Donlevy.
 Featuring love triangles and a Native American uprising, it was adapted from the Saturday Evening Post novel "Canyon Passage" by Ernest Haycox.
 Hoagy Carmichael (music) and Jack Brooks (lyrics) were nominated for Academy Award for Best Original Song for "Ole Buttermilk Sky".
Three Hours to Kill is a 1954 American Western film directed by Alfred L. Werker and starring Dana Andrews and Donna Reed.
Walter Van Tilburg Clark (August 3, 1909 – November 10, 1971) was an American novelist, short story writer, and educator.
 He ranks as one of Nevada's most distinguished literary figures of the 20th century, and was the first inductee into the 'Nevada Writers Hall of Fame' in 1988.
 Two of his novels, "The Ox-Bow Incident" and "The Track of the Cat," were made into films.
 As a writer, Clark taught himself to use the familiar materials of the western saga to explore the human psyche and to raise deep philosophical issues.
Town Tamer is a 1965 American Western film directed by Lesley Selander and written by Frank Gruber.
 The film stars Dana Andrews, Terry Moore, Pat O'Brien, Lon Chaney Jr., Bruce Cabot, Lyle Bettger and Richard Arlen.
 The film was released on July 7, 1965, by Paramount Pictures.
California Joe is a 1943 American Western film directed by Spencer Gordon Bennet and written by Norman S. Hall.
 The film stars Don "Red" Barry, Wally Vernon, Helen Talbot, Twinkle Watts, Brian O'Hara and Terry Frost.
 The film was released on December 29, 1943, by Republic Pictures.
Calling Wild Bill Elliott is a 1943 American Western film directed by Spencer Gordon Bennet and written by Anthony Coldeway.
 The film stars Wild Bill Elliott, George "Gabby" Hayes, Anne Jeffreys, Herbert Heyes, Robert 'Buzz' Henry, Fred Kohler, Jr. and Roy Barcroft.
 The film was released on April 30, 1943, by Republic Pictures.
Johnny Reno is a 1966 American western film made by A.C. Lyles Productions and released by Paramount Pictures.
 It starred Dana Andrews and Jane Russell.
 It was directed by R.G. Springsteen, produced by A.C. Lyles, with a screenplay by Andrew Craddock, Steve Fisher and A.C. Lyles.
The Ox-Bow Incident is a 1943 American Western film noir directed by William A. Wellman, starring Henry Fonda, Dana Andrews and Mary Beth Hughes, with Anthony Quinn, William Eythe, Harry Morgan and Jane Darwell.
 Two drifters are passing through a Western town, when news arrives that a local rancher has been murdered and his cattle stolen.
 The townspeople, joined by the drifters, form a posse to catch the perpetrators.
 They find three men in possession of the cattle, and are determined to see justice done on the spot.
Carver Dana Andrews (January 1, 1909 – December 17, 1992) was an American film actor and a major Hollywood star during the 1940s.
 He continued acting in less prestigious roles into the 1980s.
 The role for which he received the most praise, was as war veteran Fred Derry in "The Best Years of Our Lives" (1946).

Question: American film actor, Dana Andrews, starred in the 1943 American Western film The Ox-Bow Incident, however, he is most famous for his role as war veteran Fred Derry in what film?
Answer: The Best Years of Our Lives