La Pampa Province in the context of "Neuquén Province"

The Colorado River (Spanish: Río Colorado, Spanish pronunciation: [ˈri.o koloˈɾaðo]) is a river in the center of Argentina.

The Colorado River marks most of the political boundary between the Argentine provinces of Neuquén and Mendoza, and between Rio Negro and La Pampa. Its man-made dam, "Embalse Casa de Piedra," serves both to generate hydroelectricity for the arid region the river traverses, and to regulate the river's water level.

Río Negro (Spanish pronunciation: [ˈri.o ˈneɣɾo], Black River) is a province of Argentina, located in northern Patagonia. Neighboring provinces are from the south clockwise Chubut, Neuquén, Mendoza, La Pampa and Buenos Aires. To the east lies the Atlantic Ocean.

Its capital is Viedma near the Atlantic outlet of the province's namesake river in the eastern extreme. The largest city is Bariloche in the far west in the Andean foothills. Other important cities include General Roca and Cipolletti.

The history of immigration to Argentina can be divided into several major stages:

• Spanish colonization between the 16th and 18th century, mostly male, largely assimilated with the natives through a process called miscegenation. Although, not all of the current territory was effectively colonized by the Spaniards. The Chaco region, Eastern Patagonia, the current province of La Pampa, the south zone of Córdoba, and the major part of the current provinces of Buenos Aires, San Luis, and Mendoza were maintained under indigenous dominance—Guaycurúes and Wichís from the Chaco region; Huarpes in the Cuyana and north Neuquino; Ranqueles in the east of Cuyo and north from the Pampean region; Tehuelches and Mapuches in the Pampean and Patagonian regions, and Selknam and Yámanas in de Tierra del Fuego archipelago—which were taken over by the Mapuches; first to the east of Cordillera de los Andes, mixing interracially with the Pehuenches in the middle of the 18th century and continuing until 1830 with the indigenous Pampas and north from Patagonia, which were conquered by the Argentine State after its independence.
• The African population, forcibly introduced from sub-Saharan Africa (mainly of Bantu origin), taken to work as slaves in the colony between the 17th and 19th centuries in great numbers.
• Immigration mostly European and to a lesser extent from Western Asia, including considerable Arab and Jewish currents, produced between the end of the 19th century and the first half of the 20th century (particularly Italians and Spaniards in that quantitative order), promoted by the Constitution of 1852 that prohibited establishing limitations to enter the country to those "strangers that bring through the purpose of working the land, bettering the industries, and introducing and teaching the sciences and the arts"  and order the State to promote "European" immigration, even though after predomination of Mediterranean immigrants, from Eastern Europe and the western Asia. Added to this is the Alberdian precept of "to govern is to populate." These politics were destined to generate a rural social fabric and to finalize the occupation of the Pampean, Patagonian, and Chaco territories, that until the 1880s, were inhabited by diverse indigenous cultures.
• European immigration in the 19th century and early 20th century (mainly Italian and Spanish), focused on colonization and sponsored by the government (sometimes on lands conquered from the native inhabitants by the Conquest of the Desert in the last quarter of the century).
• The immigration from nearby countries (Uruguay, Chile, Brazil, Bolivia, and Paraguay) from the 19th to 21st century. These immigration streams date back to the first agro-pottery civilizations that appeared in Argentine territory.
• From the 1980s and 1990s, the migration currents especially come from Chile, Paraguay, Bolivia, Peru, Asia (particularly from Korea, China, and Japan in this period) and Eastern Europe.
• During the 21st century, a part of Argentine migrants and their descendants returned from Europe and the United States. In addition, immigrants from Bolivia, Paraguay, and Peru; now there are also migratory streams from China, Brazil, Colombia, Cuba, Venezuela, Senegal, Ecuador, Dominican Republic, and Haiti.
• Mostly urban immigration during the era of rapid growth in the late 19th century (from 1880 onwards) and the first half of the 20th century, before and after World War I and also after the Spanish Civil War.

The Pampas (/ˈpæmpəz/; from Quechua pampa 'plain'), also known as the Pampas Plain, are fertile South American low grasslands that cover more than 1,200,000 square kilometres (460,000 sq mi) and include the Argentine provinces of Buenos Aires, La Pampa, Santa Fe, Entre Ríos, and Córdoba; all of Uruguay; and Brazil's southernmost state, Rio Grande do Sul. The vast plains are a natural region, interrupted only by the low Ventana and Tandil hills, near Bahía Blanca and Tandil (Argentina), with a height of 1,300 m (4,265 ft) and 500 m (1,640 ft), respectively. This ecoregion has been changed by humans, especially since the release of animals like cattle, pigs, and especially sheep onto these plains.

The climate is temperate, with precipitation of 600 to 1,200 mm (23.6 to 47.2 in) that is more or less evenly distributed throughout the year, making the soils appropriate for agriculture. The area is also one of the distinct physiography provinces of the larger Paraná–Paraguay plain division.

Mendoza (Spanish pronunciation: [menˈdosa]), officially the Province of Mendoza, is a province of Argentina, in the western central part of the country in the Cuyo region. It borders San Juan to the north, La Pampa and Neuquén to the south, San Luis to the east, and the republic of Chile to the west; the international limit is marked by the Andes mountain range. Its capital city is the homonymous city of Mendoza.

Covering an area of 148,827 km, it is the seventh biggest province of Argentina with 5.35% of the country's total area. The population for 2022 is 2,014,533 inhabitants, which makes it the fifth most populated region of the country, or 4.38% of the total national population.

Buenos Aires, officially the Buenos Aires Province, is the largest and most populous Argentine province. It takes its name from the city of Buenos Aires, the capital of the country, which used to be part of the province and the province's capital until it was federalized in 1880. Since then, in spite of bearing the same name, the province does not include Buenos Aires city, though it does include all other parts of the Greater Buenos Aires metropolitan region, which include approximately three-fourths of the conurbation's population. The capital of the province is the city of La Plata, founded in 1882.

It is bordered by the provinces of Entre Ríos to the northeast, Santa Fe to the north, Córdoba to the northwest, La Pampa to the west, Río Negro to the south and west and the Autonomous City of Buenos Aires to the northeast. Uruguay is just across the Rio de la Plata to the northeast, and both are on the coast of the Atlantic Ocean to the east. Almost the entire province is part of the Pampas geographical region, with the extreme south often considered part of the Patagonia region.

Córdoba (Spanish pronunciation: [ˈkoɾðoβa]) is a province of Argentina, located in the center of the country. Its neighboring provinces are (clockwise from the north) Santiago del Estero, Santa Fe, Buenos Aires, La Pampa, San Luis, La Rioja, and Catamarca. Together with Santa Fe and Entre Ríos, the province is part of the economic and political association known as the Center Region.

Córdoba is the second-most populous Argentine province, with 3,978,984 inhabitants, and the fifth by size, at about 165,321 km (63,831 sq mi). Almost 41% of its inhabitants reside in the capital city, Córdoba, and its surroundings, making it the second most populous metro area in Argentina.