Question: The USS Luiseno was named after the tribe of Native Americans with how many cultural/linguistic divisions?
Sentence (from "Native Americans in the American Civil War"): 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.
Relevant evidence: No