Technically the CIA and Army didn't create LSD, they just learned how to abuse it. Albert Hoffman discovered LSD and took his first trip on April 19th, 1943. Once Hoffman discovered the drug he sent it to a bunch of different doctors and psychiatrists. Then a couple decades later LSD had been popularized as a mainstream drug that people were using regularly. A man named Timothy Leary used to throw Acid parties and a lot of people hold him responsible for getting the drug into the public eye which ultimately lead to its suppression. I believe it was the MK Ultra projects where the military was experimenting with LSD, MDMA, and other psychedelic substances to see if they could use them as a truth drug for interrogations and a mind control substance. What they ultimately found is that when soldiers would take LSD in military experiments the soldiers would have realizations about how wrong the war was and they would want to leave the Army. The Government found that Albert's drug liberated the mind, not suppressed it, so they made it illegal in order to suppress the people.