Here's a quick summary of a great story.
When Rhodesia was in the process of becoming Zimbabwe, the existing White government was cut off from the world's arms supplies. They had an ammo shortage.
From on high came orders to shoot any man who went full auto in any combat situation.
Every soldier, each and every one, became a far more effective killer.
A standard 180 or 240 round load per man was usually far more than necessary.
These soldiers became greatly feared...not unlike a US Marine.
Everyone in the world KNOWS every US Marine is a rifleman first.
Well, everyone 'cept members of the US Army.
Yeah, we Army guys know they're Squid-borne Rangers. ;)