Is it true that is the movie hart's war a true story based on the following text?

Hart's War is a 2002 American thriller drama film about a World War II prisoner of war (POW) camp based on the novel by John Katzenbach. It stars Bruce Willis as Col. William McNamara and Colin Farrell as Lt. Thomas Hart. The film co-stars Terrence Howard, Cole Hauser and Marcel Iures. The film, directed by Gregory Hoblit, was shot at Barrandov Studios in Prague, and released on 15 February 2002. The film earned mixed reviews and did poorly at the box office.
no