system
Given the following post, respond as if you're commenting on Reddit:
human
(Star Trek) How effective would a Klingon Bat'leth be in WW2 or the Korean War during close combat?

Assuming the wielder had sufficient training and experience. 

edit:  It sounds like a Bat'leth was really more effective in the hands of a Klingon.  I am rewatching DS9 and the Blood Oath episode was on which made me think about this question.  Thanks for the answers!
gpt
Bat'leths are not particularly effective weapons.... at least for humans. Their reach when being held by two hands is shockingly short, and you can only get longer reach on them with a HUGE, slow, sweeping slash. (And even when you do that, it's can't possibly be balanced - it's symmetrical, and the center of mass must be out in the center by design.)

So bat'leth versus sword, both in the hands of humans, is no contest - most swords will win every time. That said, there weren't a lot of swordfights in World War II. So it'd be up against, what, combat knives? Well, pretty much any weapon beyond bare fists will beat a combat knife, and you can't carry a bat'leth on your belt like you can a knife, so there's really no comparison at all, and it's really not much of a credit for the bat'leth to beat one.

Machineguns will beat the shit out of a bat'leth, though.