Agent Orange
cyinide
Kent state
Presuming you mean the government supported by the US: The Republic of South Vietnam.
SOUTH Vietnam was called the "REPUBLIC of South Vietnam." Everyone in those days just called North Vietnam...NORTH VIETNAM.
smallpox
Australians.
China
Dr. Josef Mengel
No US General conducted such operations. See website: Vietnam War
The chemical name for adderall is amphetamine,(very closely related to methamphetamine, (street names: crank,ice) which is a deadly street drug. Ritalin's chemical name is Methylphenadate,which also very closely related to Cocain.
Chlorophyll
US Military newspaper: Stars & Stripes