The Navajo Code Talkers were vital to the allies fight against the axis powers. As Marines, they participated in massively coordinated missions that drastically changed the course of the war by simply speaking their own language. One example of this would be the assault on Iwo Jima.
The Tuskegee Airmen were a group of African Amerocan fighter pilots who escorted American bombers flying over Italy flying P-47s and P-51s.