 The Model 1897 was popular before World War I, but it was after the war broke out that sales of the Model 1897 picked up. This was because many were produced to meet the demands of the Military. When the United States entered World War I, there was a need for more service weapons to be issued to the troops. It became clear to the United States just how brutal trench warfare was, and how great the need was for a large amount of close-range firepower while fighting in a trench, after they had observed the war for the first three years. The Model 1897 Trench grade was an evolution of this idea. The pre-existing Winchester Model 1897 was modified by adding a perforated steel heat shield over the barrel which protected the hand of the user from the barrel when it became over-heated, and an adapter with bayonet lug for affixing an M1917 bayonet.
