Factual error: After the birth of the baby, James Stewart and "Doc" Witherspoon are discussing the course of the war. "Doc" relates that he has always lived in Virginia and that his son died at Gettysburg at Little Round Top. No Virginia regiments fought at Little Round Top - only Alabama, Texas, Georgia, and Arkansas regiments.
Continuity mistake: In the marriage scene, light is shining through the church windows. It is obvious that filming started in the early morning and finished in late afternoon.
Jacob Anderson: I know how you feel about this war, Pa. I guess we more or less feel the same way, but I don't see how we can sit by and ignore it anymore. Now you say it's not our business, not our fight, but we're Virginians and I believe that anything that concerns Virginia concerns us.
Carter: You can have your chance tonight, if you want to take it.
Boy Anderson: Chance for what?
Carter: To run. They don't waste men on prisoner duty and they're usually the worst of the lot. They plan on herdin' us onto that sternwheeler and some of us don't fancy no sightseein' tour up North. When they open that gate tonight, you stay as close to me as a flea on a hound dog. Somethin' else. Once we get goin', you're on your own. I gotta forget you ain't nothin' but a lap baby.