The military code-talking system refers to

the secret languages used for communication.

Explanation: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

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.