who were the inhabitants?
Martis people and indigenous people.
Sierra Nevada
Archaeological excavations placed Martis people of Paleo-Indians in northcentral Sierra Nevada during the period of 3,000 BCE to 500 CE. 
what is manzanar? It is the site of one of ten American concentration camps. who were the residents? Japanese Americans. which war led them to the camp? World War II. how long they had to be there? From March 1942 to November 1945. where was the camp set? It is located at the foot of the Sierra Nevada mountains.
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Sierra Nevada [SEP] Native Americans
Archaeological excavations placed Martis people of Paleo-Indians in northcentral Sierra Nevada during the period of 3,000 BCE to 500 CE. The earliest identified sustaining indigenous people in the Sierra Nevada were the Northern Paiute tribes on the east side, with the Mono tribe and Sierra Miwok tribe on the western side, and the Kawaiisu and Tübatulabal tribes in the southern Sierra. Today, some historic intertribal trade route trails over mountain passes are known artifact locations, such as Duck Pass with its obsidian arrowheads. The California and Sierra Native American tribes were predominantly peaceful, with occasional territorial disputes between the Paiute and Sierra Miwok tribes in the mountains.