During world war 1 native americans were noted for which of these contributions to the war effort combat service in the army employment in war industries contributions to the medical corps use as code-breakers for the military

"Use as code-breakers for the military"

Explanation:

Key Speaker is the term used to refer to people who communicate using encrypted languages. It is usually used to name Native Americans who served in the United States Marine Corps and whose main occupation was to transmit secret military messages.

These messages were transmitted, usually by telephone or radio, using codes built on their own languages, known to small groups, sometimes dozens of people around the world, which was a great strategic advantage. This advantage lies in the fact that military codes can be broken or deciphered with relative ease, whereas such a minority human language requires a long process of study in order to understand it.

The name Locutores de claves is strongly associated with Navajo Indians, who used their language to send secret military messages during the First World War and the Second World War, serving as a great help to the US Army, mainly in the Pacific area.

after the civil war, and with the termination of slavery, the south was faced with a big problem; what was supposed to happen and how they were supposed to deal with the freedom and the rights that black people and freed slaves had gained as a result of the north defeating the south and forcing the end of slavery. first, most, if not all, of the workforce of the south came from slaves and they did not have an option to replace the loss of said workforce. second, particularly in the south, people were convinced that black people were lesser, less intelligent, less capable and less smart than whites. this posed a huge problem for them. also, southerners were faced with another issue; freed slaves now had a say in how their lives would be lived and the right to politically choose the way they would be governed. people in the south did not want to accept this, none of this and this opposition and the conflicts that arose from it, not to mention the afereffects of the war, forced the congress of the time to enact and enforce the reconstruction plans that had been proposed by president andrew johnson.

is it multiple choice