WW2 USN Chemical Warfare: Navy Gas Mask Drill for Mark III and Mark IV January 7, 2019 Nicola Military History WW2 USN Chemical Warfare: Navy Gas Mask Drill for Mark III and Mark IV U.S. Navy training film #MN-3584A Chemical Warfare: Navy Gas Mask Drill For Mark III And Mark IV National Archives Identifier: 12941 Please support our Sponsors - Or Buy an Item from our Catalog