It is said that during WWII the Nazi's and the Japanese constantly drugged their troops with large amounts of Meth, did this frequent drug use effect the methods armies used in their invasions? Would Meth'ed up soldiers be more willing to commit certain atrocities over others?

by mrbeanbagman

A Japanese chemist first synthesized methamphetamine—also called meth, crank, crystal meth or speed—from another stimulant in 1893. Methamphetamine was used early on as a medical treatment for narcolepsy, asthma and as a weight-loss drug. During World War II, the Allies and Axis powers both used the drug to keep troops awake. After the war, meth use increased dramatically, even after it was outlawed by the United States in 1970.

from my experience constant use of drugs like meth cause the users to become paranoid and aggressive when used long term, especially when abused, what effect did this have on the actions of the armies that used it?

could meth have been the precursor to the savagery of certain events like the rape on nanking or other atrocities?

Klesk_vs_Xaero

While you wait for a "fresh" answer, there are a few posts by /u/commiespaceinvader that address the issue of drug use among German troops and the (very questionable) alleged role of drug abuse in motivating Nazi atrocities: here and here.