tribes in order to force them back onto reservations led to a number of wars with Native Americans which included some massacres. The most well-known conflict was the Sioux War on the northern Great Plains, between 1876 and 1881, which included the Battle of Little Bighorn. Other famous wars in this regard included the Nez Perce War and the Modoc War, which marked the last conflict officially declared a war. By the late 1870s, the policy established by President Grant was regarded as a failure, primarily because it had resulted in some of the bloodiest wars between Native Americans and the United States. By 1877, President Rutherford B. Hayes began phasing out the policy, and by 1882 all religious organizations had relinquished their authority to the federal Indian agency. Individualized reservations (1887–1934) In 1887, Congress undertook a significant change in reservation policy by the passage of the Dawes Act, or General Allotment (Severalty) Act. The act ended the general policy of granting land parcels to tribes as-a-whole by granting small parcels of land to individual tribe members. In some cases, for example, the Umatilla Indian Reservation, after the individual parcels were granted out of reservation land, the reservation area was reduced by giving the "excess land" to white settlers. The individual allotment policy continued until 1934 when it was terminated by the Indian Reorganization Act. Indian New Deal (1934–present) The Indian Reorganization Act of 1934, also known as the Howard-Wheeler Act, was sometimes called the Indian New Deal and was initiated by John Collier. It laid out new rights for Native Americans, reversed some of the earlier privatization of their common holdings, and encouraged tribal sovereignty and land management by tribes. The act slowed the assignment of tribal lands to individual members and reduced the assignment of "extra" holdings to nonmembers. For the following 20 years, the U.S. government invested in infrastructure, health care, and education on the reservations. Likewise, over two million acres (8,000 km2) of land were returned to various tribes. Within a decade of Collier's retirement the government's position began to swing in the opposite direction. The new Indian Commissioners Myers and Emmons introduced the idea of the "withdrawal program" or "termination", which sought to end the government's responsibility and involvement with Indians and to force their assimilation. The Indians would lose their lands but were to be compensated, although many were not. Even though discontent and