What war had the most profound impact on the writing known as Modern American Fiction?

American Civil War

[From loc.gov] "Stephen Crane, “The Red Badge of Courage” (1895)

One of the most influential works in American literature, Stephen Crane's “The Red Badge of Courage” has been called the greatest novel about the American Civil War."

just add on too that

explanation:

each year on march 8, international women’s day is celebrated around the globe. it’s an important opportunity to shine a spotlight on women’s involvement, contributions, and accomplishments on a range of issues from domestic violence to the role of women in the c-suite. the theme this year is “be bold for change”― a dictum that those who know me personally will acknowledge has pretty much been my mantra throughout my career on wall street, in media and most recently, in philanthropy.the empowerment of girls as leaders, who can be emboldened today to become even stronger leaders tomorrow, is an increasingly recognized imperative in our world, and it couldn’t be closer to my heart

are there answer choices to this particular question?