It makes the Sergeant dicked for this particular task sound as wise as a group of levitating Tibetan Monks on a hilltop retreat. The phrase can actually be applied to both 9mm and 7.65mm ammunition, but since people stopped using the Luger Pistol about the same time they stopped putting spikes on their helmets, this piece of information is of no use whatsoever.
It is derived from the Latin “Si vis pacem, para bellum” which only staff officers who went to Eton in the 1960’s are expected to know. So that’s basically all of them then. Translated it means “If you wish for peace, prepare for war” Since it was the German Deutsche Waffen und Munitionsfabriken who invented the moniker, it can be assumed that they forgot the first half of the phrase and really concentrated with laser like German precision on the “preparing for war” bit.