Passchendaele is a small town in Flanders, Belgium. Mustard gas was used there for the first time in the Flanders Fields of WW I , during the Third Battle of Ypres in 1917 . 

Passchendaele 1917, mixed media, 35"h.x 10"w.x 6"d. 2014

In Genocide, Man's inhumanity to humankind, at the Holocaust Museum of Houston, September-December 2016,  curated by Clint Willour.