California Rancheria Termination Acts
The California Rancheria Termination Acts refer to three acts of Congress and an amendment passed in the 1950s and 1960s as part of the US Indian termination policy. The three Acts, passed in 1956, 1957, and 1958 targeted 41 rancherías for termination.
Source: Wikipedia — California Rancheria Termination Acts (CC BY-SA 4.0)