For enthusiasts of the Escadrille Lafayette and Americans in the Legion Etrangere:

The State Archives of North Carolina, which holds Paul and Kiffin Rockwell's papers have digitized 100 photos and made them available in a Flickr Album.

https://www.flickr.com/photos/north-carolina-state-archives/sets/72157670120706717/with/43301699264/

Clicking on the individual photographs will bring up a detailed caption.