Jul 21 1918 “American Mobile Degassing U…

Jul 21 1918 “American Mobile Degassing Unit No 1. SOS with mobile shower spray in full operation at Tours” https://t.co/h90qC2bxGt https://t.co/Mn3azkA8qZ http://twitter.com/ThisDayInWWI/status/1020640422970847237