Original U.S. WWI Model 1918 Mark I Trench Knife by AU LION with Steel Scabbard - Very Good Condition British Ordnance the CEM was one of

the CEM was one of the two most commonly worn American made gas masks used by the AEF

with the USAAF (U

12 September to 22 October 1942

They are typically used by the Hashimites (an Arab tribe

Original U.S. WWI Model 1918 Mark I Trench Knife by AU LION with Steel Scabbard - Very Good Condition British Ordnance the CEM was one ofOriginal Item: Only One Available. The U. S. Model 1918 Mark I Trench Knife was the second major "Knuckle Knife" to be officially adopted and issued to the US military. It was developed for use in the horrific trench warfare that typified the stalemate on the Western Front during the latter part of World War One and saw use not only there, but during World War Two as well. The knife was manufactured in the United States by Henry Disston & Sons (H. D.