The Pascua Yaqui Tribe is a federally recognized tribe of Yaqui Native Americans in southern Arizona. The Pascua Yaqui Tribe is a federally recognized tribe of Yaqui Native Americans in southern Arizona. Descended from the Yaqui people whose homelands stretched from the modern day southwestern United States south into northern Mexico, the Pascua Yaqui Tribe sought refuge from the United States government during the Mexican Revolution. The United States subsequently recognized lands that were part of Yaqui ancestral territories near Nogales and south Tucson in the early 1800s. In the early 20th century, the tribe began to return to settlements south of Tucson in an area they named Pascua Village, and in Guadalupe, near Tempe. They gained recognition by the United States government on September 18, 1978. In 552 AD, Yaquis were living in family groups along the Yaqui River (Yoem Vatwe) north to the Gila River, where they gathered wild desert foods, hunted game and cultivated corn, beans, and squash. Yaquis traded native foods, furs, shells, salt, and other goods with many indigenous groups of central North America. Among these groups are the Shoshone, the Comanche, the Pueblos, the Pimas, the Aztecs, and the Toltec. Yaquis roamed extensively in pre-Columbian times and sometimes settled among other native groups like the Zunis. After contact with non-Natives after the Spanish's arrive in the 1500s, the Yaquis came into an almost constant conflict with Spanish colonists and the later Mexican republic, a period known as the Yaqui Wars, which ended in 1929. The 400 years of wars with the occupiers sent many Yaquis north from Mexico back into Arizona, and the southwestern United States. In 1964, Congressman Morris K. Udall introduced a bill in Congress for the transfer to the Tribe of 202 acres (0.82 km2) southwest of Tucson. The bill was approved in August 1964 and the Pascua Yaqui Association, a nonprofit Arizona corporation, was formed to receive the deed for the land from the federal government. In early 1977, Mr. Raymond Yberra and Mr. Anselmo Valencia, representing the Pascua Yaqui Association, met with US Senator Dennis DeConcini (D -AZ) to urge him to introduce legislation to provide complete Federal Recognition of the Yaqui people living on the property conveyed to the Pascua Yaqui Association by the United States through the Act of October 8, 1964. (78 Stat. 1197). Senator DeConcini introduced S.1633 on June 7, 1977. After extensive hearings and consideration, it was passed by the senate on April 5, 1978. It was accepted by the Conference Committee with the House of Representatives and the Conference Report was passed by the Senate. It became public law, PL 95-375, on September 18, 1978. The law provides for all federal services and benefits including those provided by the Bureau of Indian Affairs and the Indian Health Service. It gives the tribe powers of self-government, with Reservation status for Yaqui lands. The Pascua Yaqui Tribe of Arizona received designation as a historical tribe in 1994. In 1988 the Tribe's first constitution was approved. The Pascua Pueblo Yaqui Reservation (32°06′56″N 10°04′48″W / 32.11556°N 10.08000°W / 32.11556; -10.08000) is located in Pima County, in the southwestern part of the Tucson metropolitan area, amidst the suburban communities of Drexel Heights and Valencia West, and adjacent to the eastern section of the Tohono O'odham Indian Reservation, known as the San Xavier Indian Reservation. It has a land area of 4.832 km² (1.8657 sq mi, or 1,194 acres), and a 2000 census resident population of 3,315 persons, over 90 percent of whom are Native Americans. The community is governed by a chairman, a vice chairman and nine tribal council members. Police protection is provided by the Tribal Police Department, and fire protection is provided by six full-time firefighters and four reserves.