The opening battle scenes are taken from Raintree County (1957) and are printed as a mirror image of the original footage. The same scenes can also be seen in, amongst other films, How the West Was Won (1962).
At the church, viewers observe Confederate soldiers with different colors of trim on their uniforms. The color red represents an artillery unit, blue represents an infantry unit and yellow represents a cavalry unit. Those same traditional military branch colors are still used in the U.S. Army.
The Broadway musical based on this movie opened on January 7, 1975 at the Alvin Theater and ran for one thousand fifty performances, and received 1975 Tony Award nominations for Best Musical, Book and Score.
The train that Anderson stops is pulled by a locomotive called the General Gault. The source of the name is unclear. The only noted pre-American Civil War military person of that name served in Napoleon's forces. A search of the web reveals only two other generals of that name, one from the U.S. in the 1950s, and one Canadian (served in World War II).
A musical version of "Shenandoah" toured the US in early 1974 but failed to make it to Broadway. Originally they wanted either Robert Ryan or Jack Palance as the main lead, John Cullum would end up playing the James Stewart role.