I remember reading that when the 1903 Springfield was adopted, they decided to use a thin ice pick type bayonet.
When TR saw it he nearly had a fit and ordered them to go back to the knife style.
I suspect the Army actually had a valid reason for their new bayonet, but TR was probably right.
A triangular shaped bayonet creates a wound that can’t not be easily repaired, so the recipient usually bleeds to death. They were outlawed by the Geneva Convention, and apparently TR.
Spike bayonets were pretty common when the ‘03 Springfield came out. The blade bayonet, aside from utility as a knife, served as a short sword in a pinch. (They used pretty long ones in those days).