Women who disguised themselves as men and went to war

[RJNorton]

Back in the days when I was teaching I used to mention to the class that a few women dressed as men and served in the Civil War. Regarding the actual number, I believe my textbook said something like "a handful." But there is an article on the Smithsonian website that says the actual number was about 400. I had no idea the number was that high. The article is here.