The Opata ("enemies", so called by their neighbors the The Pima are a group of Native Americans living in central and southern Arizona and what is now Mexico. Hailing from Uto-Aztecan lingual stock, they were visited very early by Spanish missionaries, and friendly to Anglos. Enemies of the Apache, they farmed by use of irrigation and are known... Pimas) were a tribe of For other uses, see Mexico (disambiguation). The United Mexican States or Mexico (Spanish: Estados Unidos Mexicanos or México; regarding the use of the variant spelling Méjico, see section The name below) is a country located in North America, bordered to the north by the United States, to the... Mexican Indians of Piman stock. Their country is the mountainous district of north-eastern This article is about the Mexican state of Sonora. For other places with the same name, see Sonora (disambiguation). ESTADO DE SONORA Other Mexican States Capital Hermosillo Other major cities Ciudad Obregón Nogales list of municipalities Area 182,052 km² Ranked 2nd Population (2000 census) 2,213,370 Ranked... Sonora and northwestern This article needs cleanup. Please edit this article to conform to a higher standard of article quality. This article is about the city in Mexico. For the state of Chihuahua, see State of Chihuahua. For other meanings of Chihuahua, see Chihuahua (disambiguation). Chihuahua is the capital of the state of... Chihuahua, Mexico. Though usually loyal to the Mexican government, they rebelled in Years: 1817 1818 1819 - 1820 - 1821 1822 1823 Decades: 1790s 1800s 1810s - 1820s - 1830s 1840s 1850s Centuries: 18th century - 19th century - 20th century 1820 in art 1820 in literature 1820 in science 1820 in music 1820 in sports List of state leaders in 1820 List of religious leaders in 1820... 1820, but after a gallant effort were defeated. They number now about 5000, and still largely retain their ancient autonomy.

This article incorporates text from the The public domain comprises the body of all creative works and other knowledge—writing, artwork, music, science, inventions, and others—in which no person or organization has any proprietary interest. (Proprietary interest is typically represented by a copyright or patent.) Such works and inventions are considered part of... public domain The Eleventh Edition of the Encyclopædia Britannica (1911) in many ways represents the sum of knowledge at the beginning of the 20th century. The edition is still often regarded as the greatest edition of the Encyclopædia Britannica, with many articles being up to 10 times the length of... 1911 Encyclopædia Britannica.