I wanted to take part in this contest to demonstrate my respect for history.
The U.S. Army trench knife, conceptualized, manufactured, tested, re-conceptualized and issued In response to the U.S. entry into World War 1 in 1917, was utilized to fend off trench raids and invasions when close quarters warranted a shift to hand to hand combat.
[Edit] I got this from a family member, probably from online or some collector's store for my birthday in 2020, a few short years ago, since they know I am an avid history buff including Military and U.S. history, and the World Wars too.