According to director Lewis Milestone, Pork Chop Hill was cut by nearly 20 minutes because the wife of Gregory Peck felt that her husband made his first entrance too late into the picture. True or not, the film does show signs of post-production tampering, with flashes of several excised scenes showing up under the main title credits.
Opening credits prologue: This is a true story, based on the book by Brig. Gen.S.L.A. Marshall USAR. In most cases not even the names of the people have been changed. We are deeply grateful for the cooperation of the United States Army.