Final answer:
The American scientific community actively contributed to World War I by developing new weapons, chemicals, medicines, and medical techniques to fight against the Axis powers.
Step-by-step explanation:
The American scientific community played an active role in World War I by participating in the development of new weapons, chemicals, medicines, and medical techniques that advanced the fight against the Axis powers. The government supported and invested in scientific research for the war effort, and scientists contributed their expertise to aid the military. This collaboration led to significant technological advancements that affected both the war and the postwar global society.