History of North America

Do you use affect or effect in this sentence That documentary on the Civil War had a profound your view of nature warfare?

The correct word to use in this sentence is "effect". "Effect" is a noun that refers to a change or result that is caused by an action or event. "Affect" is a verb that means to influence or have an impact on something. In this sentence, the documentary had an effect on the person's view of nature warfare. It changed or influenced their perspective.