Long story short - just like with gay bombs and all these other sorts of Cold War esoterica - is that humans are really complicated, and war is even more complicated. Turns out making people gay or psychotic - even if the chemicals did work at doing this, which is dubious given their tenuous understanding of what "gay" or "psychosis" was - doesn't actually reduce their warfighting capability. Sometimes, it even made a tenable tactical situation much worse.
Now, when it came to making people think they were going crazy, that's where these substances really started to find some traction, but that wasn't a military application. More the territory of the CIA headshrinkers.
Long story short - just like with gay bombs and all these other sorts of Cold War esoterica - is that humans are really complicated, and war is even more complicated. Turns out making people gay or psychotic - even if the chemicals did work at doing this, which is dubious given their tenuous understanding of what "gay" or "psychosis" was - doesn't actually reduce their warfighting capability. Sometimes, it even made a tenable tactical situation much worse.
Now, when it came to making people think they were going crazy, that's where these substances really started to find some traction, but that wasn't a military application. More the territory of the CIA headshrinkers.