Good guesses, Roger and Anita, but HA! - Betty has got it! It's Mary Edwards Walker.
And I thought I could cheat you by the dress, the curls and by leaving out the Medal of Honor! Most photos show her like this:
Another great woman!
There are sure many interesting sites about her, this is just an "appetizer": http://www.holloman.af.mil/news/story.asp?id=123194813