Who were the tribes that composed the army of the confederates

The American Civil War saw Native American individuals, bands, tribes, and nations participate in numerous skirmishes and battles.[2] Native Americans served in both the Union and Confederate military during the American Civil War. They were found in the Eastern, Western, and Trans-Mississippi Theaters. At the outbreak of the war, for example, the majority of the Cherokees sided with the Union, but soon after allied with the Confederacy.[3] Native Americans fought knowing they might jeopardize their sovereignty, unique cultures, and ancestral lands if they ended up on the losing side of the Civil War.[2][3] 28,693 Native Americans served in the Union and Confederate armies during the Civil War, participating in battles such as Pea Ridge, Second Manassas, Antietam, Spotsylvania, Cold Harbor, and in Federal assaults on Petersburg.

Explanation:

c) they were beaten and fired from their jobs.