Students of École Polytechnique vigorously defending artillery post at St. Chaumont.  
<br>Lithograph
<a rel="nofollow" class="external free" href="https://www.britishmuseum.org/collection/object/P_1917-1208-4002">https://www.britishmuseum.org/collection/object/P_1917-1208-4002</a>