Markings on bottom of shell casing : r/MilitaryHistory

U.S. Army 1st Cavalry Division

Can anyone tell me what the markings on the bottom of this shell

Can anyone identify this shell casing? (More info in comments) : r

The Guns That Won – British And American Small Arms Of WW2

The Case for Trump from Leadership Books

Can anyone identify this shell casing? (More info in comments) : r/TankPorn

military - Can anyone tell me anything about the markings on these shell casings? - History Stack Exchange

7.92×33mm Kurz - Wikipedia

280 British - Wikipedia

Shell casing identification : r/Militariacollecting

Cartridge case terminology and identification – Stephen Taylor