The use of stimulants during WWII is no secret, but in the last decade, there has been a lot of discussion and analysis of it. Just how significant was drug use in Nazi Germany, and how did the Allies compare?
Research:

United States v. Bhagat Singh Thind
46:30

SYMHC Classics: Insular Cases
43:14

Behind the Scenes Minis: Friends and Bubble Guns
22:45