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Fascinating film footage from 1958 has emerged of U.S. Army volunteers tripping on LSD as part of a government experiment to see if hallucinogens could somehow be used as weapons of war.

Judging from the footage, the marching troops were having such a good time tripping that weapons of war seemed to be the farthest thing from their minds. Laughing and chaos ensued as a squad officer barked orders at them.

The film clip, taken at Edgewood Arsenal Facility in Maryland in 1958, re-emerged online recently. Between 1948 and 1975 the U.S. Army Chemical Corps reportedly conducted several experiments using LSD, as well as other drugs.

Apparently, President Dwight D. Eisenhower was enthusiastic about this particular type of clinical research.

Although most of the soldiers seem to be having a good time, we know that not everyone has the same reaction to tripping on acid. At one point during the video, the narrator says that one of the soldiers fell into a “severe depression,” which caused them to end his participation in the test. Watch below.

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