Long before the WW2 era Army decided to name everything the M1 (rifle, carbine, smg, helmet, etc), the Army used year of adoption as their naming convention.
This led to some pretty silly results, with many different types of gear sharing the same model designation.
I present to you the:
-m1917 Rifle
-m1917 Trench Knife
-m1917 Bolo Knife
-m1917 Helmet
-m1917 Bayonet
-m1917 Revolver (There were two revolvers, a S&W and a Colt variant both named m1917)
Not pictured are the m1917 Cartridge Belt, the m1917 Machine Gun, and a host of others.
While today’s system isn’t perfect (I.e. the M9 is both a pistol and a bayonet), it is a little less repetitive than the pre-ww1 system. But just to keep things wacky we’ve gone hog wild with acronyms. So instead of “Model 1983 Light Truck” we have the High Mobility Multipurpose Wheeled Vehicle (HMMWV), and instead of “Model 19XX Scout Optic” we have the Long Range Advanced Scout Surveillance System (LRAS3).
Damn it, bring back the year designations...

On 08 October 1918, Corporal Alvin York of the 82nd Division performed arguably the greatest American feat of individual bravery during the First World War (another notable contender, and much less known, is Henry Johnson, AKA "Black Death" of the Harlem Hellfighters -- I'll write about that badass when I get the right relics).

On this day in 1911 the American military received a significant boost in sidearm firepower! As the year may telegraph, it was on 29 March 1911 that the “Model of 1911” was formally adopted by the Army. It beat a field of 5 other pistols, with its closest competitor being the Savage 1907, also chambered in 45 ACP

Ahh... The classic American rifles of WW1. The m1903, the m1917 the... wait... is that a Mosin-Nagant???
To those of you who are incredulous I say: Sure is! While Mosin-Nagant pattern rifles are most closely associated with Eastern European militaries, some saw a brief stint in U.S. Military service during and immediately after WW1.