Francisco Nombre, a Desert Cahuilla ceremonial leader and keeper of traditional clan genealogy, stated that the Nanxaiyem migrated to the Coachella Valley around 1860 and their survivors settled at La Mesa, the flat land east of La Quinta, California.

[4] On April 13, 1956, the Commissioner of Indian Affairs approved a census roll of the tribe, documenting 11 living members.

[5] The reservation of the Augustine Band of Cahuilla Indians is a one-square-mile (2.6 km2) tract of land, located in Riverside County, California, at 33°39′01″N 116°11′27″W / 33.65028°N 116.19083°W / 33.65028; -116.19083.

Mary Ann Green, née Martin, born in 1964, decided to rebuild the tribe and resettle the reservation.

Improvements to reservation lands include adopting a zoning code and removing illegally dumped garbage.