What Seth found is really nice, since you have all the history behind the picture, it's really great...
The events i had on my mind were Villy La Ferté (where all the unit of the Maginot Line ouvrage died) and also the Saumur Cadets, but i didn't find any picture depicting the fights and the sacrifice spirit.
Some croquis made by Geoffrey de Navacelle, during the fights at Saumur, Aunis & Montsoreau, with the retreat of the surviving cadets honored by the german troops to the Demarcation Line. Note that he only sketched (due to the fights) and finished them later by adding details etc.