Yeah and under Clinton they legalized the testing on soldiers under: "Executive Order 13139—Improving Health Protection of Military Personnel Participating in Particular Military Operations"
In it it says "(b) It is the expectation that the United States Government will administer products approved for their intended use by the Food and Drug Administration (FDA). However, in the event that the Secretary considers a product to represent the most appropriate countermeasure for diseases endemic to the area of operations or to protect against possible chemical, biological, or radiological weapons, but the product has not yet been approved by the FDA for its intended use, the product may, under certain circumstances and strict controls, be administered to provide potential protection for the health and well-being of deployed military personnel in order to ensure the success of the military operation. "
Yeah and under Clinton they legalized the testing on soldiers under: "Executive Order 13139—Improving Health Protection of Military Personnel Participating in Particular Military Operations"
https://www.presidency.ucsb.edu/documents/executive-order-13139-improving-health-protection-military-personnel-participating
In it it says "(b) It is the expectation that the United States Government will administer products approved for their intended use by the Food and Drug Administration (FDA). However, in the event that the Secretary considers a product to represent the most appropriate countermeasure for diseases endemic to the area of operations or to protect against possible chemical, biological, or radiological weapons, but the product has not yet been approved by the FDA for its intended use, the product may, under certain circumstances and strict controls, be administered to provide potential protection for the health and well-being of deployed military personnel in order to ensure the success of the military operation. "
Ergo - we can test whatever we want on soldiers.