The military code-talking system refers to

strict rules about how soldiers behave.

secret languages used for communication.

the special technique of pronouncing letters and numbers.

the chain of command ranking structure of the armed forces.

The military code-talking system refers to the secret languages used for communication.

Code Talkers were the people who used some native language as the method of coded communication during wartime. For instance, the language Navajo helped U.S Marine Corps to transmit coded messages without any breach with the help of U.S natives, who used their expertise in this language. Because of its pronunciation, Navajo language was difficult to break.

In fact, the U.S Marine Corps concluded that at the beginning of the second World War,  the Navajo language was known to even less "than thirty non-Navajos".

The secret languages used for communication

Explanation:

I have just completed the test and earned a score of 100% on it, therefor I had to have answered this question with the utmost correction.

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.