The history of South Dakota describes the history of the U.S. state of South Dakota over the course of several millennia, from its first inhabitants to the recent issues facing the state.

Early inhabitants

Human beings have lived in what is today South Dakota for at least several thousand years. Early hunters are believed to have first entered North America at least 17,000 years ago via the Bering land bridge, which existed during the last ice age and connected Siberia with Alaska.Schell, p. 15. Early settlers in what would become South Dakota were nomadic hunter-gatherers, using primitive Stone Age technology to hunt large prehistoric mammals in the area such as mammoths, sloths, and camels. The Paleolithic culture of these people disappeared around 5000 BC, after the extinction of most of their prey species.

Between AD 500 and 800, much of eastern South Dakota was inhabited by a people known as the 'Mound Builders'.Schell, p. 16. The Mound Builders were hunters who lived in temporary villages and were named for the low earthen burial mounds they constructed, many of which still exist. Their settlement seems to have been concentrated around the watershed of the Big Sioux River and Big Stone Lake, although other sites have been excavated throughout eastern South Dakota. Either assimilation or warfare led to the demise of the Mound Builders by the year 800. Between 1250 and 1400 an agricultural people, likely the ancestors of the modern Mandan of North Dakota, arrived from the east and settled in the central part of the state. In 1325, what has become known as the Crow Creek Massacre occurred near Chamberlain.Deloria and Neal (eds.), p. 161. An archeological excavation of the site has discovered 486 bodies buried in a mass grave within a type of fortification; many of the skeletal remains show evidence of scalping and decapitation.

Arikara

The Arikara, also known as the Ree, began arriving from the south in the 16th century.Ronda, p. 44. They spoke a Caddoan language similar to that of the Pawnee, and probably originated in what is now Kansas and Nebraska.Hasselstrom, p. 124. Although they would at times travel to hunt or trade, the Arikara were far less nomadic than many of their neighbors, and lived for the most part in permanent villages.Schell, p. 17. These villages usually consisted of a stockade enclosing a number of circular earthen lodges built on bluffs looking over the rivers. Each village had a semi-autonomous political structure, with the Arikara's various subtribes being connected in a loose alliance. In addition to hunting and growing crops such as corn, beans, pumpkin and other squash,Ronda, p. 46. the Arikara were also skilled traders, and would often serve as intermediaries between tribes to the north and south. It was probably through their trading connections that Spanish horses first reached the region around 1760.Schell, pp. 17–18.Hasselstrom, p. 125. The Arikara reached the height of their power in the 17th century, and may have included as many as 32 villages. Due both to disease as well as pressure from other tribes,Ronda, p. 45. the number of Arikara villages would decline to only two by the late 18th century, and the Arikara eventually merged entirely with the Mandan to the north.Schell, p. 18.

The sister tribe of the Arikaras, the Pawnee, may have also had a small amount of land in the state. Both were Caddoan and were among the only known tribes in the continental U.S. to have committed human sacrifice, via a religious ritual that occurred once a year.Philip Duke, "THE MORNING STAR CEREMONY OF THE SKIRI PAWNEE AS DESCRIBED BY ALFRED C. HADDON", The Plains Anthropologist, Vol. 34, No. 125 (August 1989), pp. 193–203Weltfish 117 It is said that the U.S. government worked hard to halt this practice before their homelands came to be heavily settled, for fear that the general public might react harshly or refuse to move there.

Cheyenne

The Lakota Oral histories tell of them driving the Algonquian ancestors of the Cheyenne from the Black Hills regions, south of the Platte River, in the 18th century.Walker, James R. & DeMallie, Raymond J. "Lakota Society" 1992. Before that, the Cheyenne say that they were, in fact, two tribes, which they call the Tsitsistas & Sutaio "Cheyenne, Southern." Oklahoma History Center's Encyclopedia of Oklahoma History and Culture. Retrieved July 3, 2013. After their defeat, much of their territory was contained to southeast Wyoming & western Nebraska. While they had been able to hold off the Sioux for quite some time, they were heavily damaged by a smallpox outbreak. They are also responsible for introducing the horse to the Lakota.

Ioway

The Ioway, or Iowa people, also inhabited the region where the modern states of South Dakota, Minnesota & Iowa meet, north of the Missouri River. They also had a sister nation, known as the Otoe who lived south of them. They were Chiwere speaking, a very old variation of Siouan language said to have originated amongst the ancestors of the Ho-Chunk of Wisconsin. They also would have had a fairly similar culture to that of the Dhegihan Sioux tribes of Nebraska & Kansas.

Sioux By the 17th century, the Sioux, who would later come to dominate much of the state, had settled in what is today central and northern Minnesota.Schell, p. 19. The Sioux spoke a language of the Siouan language family, and were divided into two culture groups – the Dakota & Nakota. By the early 18th century the Sioux would begin to move south and then west into the plains. This migration was due to several factors, including greater food availability to the west, as well as the fact that the rival Ojibwe & other related Algonquians had obtained rifles from the French at a time when the Sioux were still using the bow and arrow.Schell, pp. 19–20.Hasselstrom, p. 126.Lass, p. 43. Other tribes were also displaced during some sort of poorly understood conflict that occurred between Siouan & Algonquian peoples in the early 18th century.

In moving west into the prairies, the lifestyle of the Sioux would be greatly altered, coming to resemble that of a nomadic northern plains tribe much more so than a largely settled eastern woodlands one.Schell, p. 22.Lass, p. 45. Characteristics of this transformation include a greater dependence on the bison for food, a heavier reliance on the horse for transportation, and the adoption of the tipi for habitation, a dwelling more suited to the frequent movements of a nomadic people than their earlier semi-permanent lodges.

Once on the plains, a schism caused the two subgroups of the Sioux to divide into three separate nations—the Lakota, who migrated south, the Asiniboine who migrated back east to Minnesota & the remaining Sioux. It appears to be around this time that the Dakota people became more prominent over the Nakota & the entirety of the people came to call themselves as such.

The Lakota, who crossed the Missouri around 1760 and reached the Black Hills by 1776, would come to settle largely in western South Dakota, northwestern Nebraska, and southwestern North Dakota.Schell, pp. 20–21.Lass, p. 40. The Yankton primarily settled in southeastern South Dakota, the Yanktonnais settled in northeastern South Dakota and southeastern North Dakota, and the Santee settled primarily in central and southern Minnesota. Due in large part to the Sioux migrations, a number of tribes would be driven from the area. The tribes in and around the Black Hills, most notably the Cheyenne, would be pushed to the west, the Arikara would move further north along the Missouri, and the Omaha would be driven out of southeastern South Dakota and into northeastern Nebraska.Hasselstrom, p. 127.

Later, the Lakota & Assiniboine returned to the fold, forming a single confederacy known as the Oceti Sakowin, or Seven council fire. This was divided into four cultural groups—the Lakota, Dakota, Nakota & Nagoda-- & seven distinct tribes, each with their own chief—the Nakota Mdewakan (Note—Older attempts at Lakota language show a mistake in writing the sound 'bl' as 'md', such as summer, Bloketu, misprinted as mdoketu. Therefore, this word should be Blewakan.Hale, Horatio "Tutelo Tribe & Language" 1883. ) & Wahpeton, the Dakota Santee & Sisseton, the Nagoda Yankton & Yanktonai & the Lakota Teton. In this form, they were able to secure from the U.S. government a homeland, commonly referred to as Mni-Sota Makoce, or the Lakotah Republic."Treaty of Fort Laramie – 1851". Retrieved January 2, 2008. However, conflicts increased between Sioux & American citizens in the decades leading up the Civil War & a poorly funded & organized Bureau of Indian Affairs had difficulty keeping peace between groups. This eventually resulted in the United States blaming the Sioux for the atrocities & rendering the treaty which recognized the nation of Lakotah null and void. The U.S., however, later recognized their fault in a Supreme Court case in the 1980s "US v Sioux Nation" 448 US 371 at 390 footnote 16. after several decades of failed lawsuits by the Sioux, yet little has been done to smooth the issue over to the best interests of both sides.

European exploration

France

France was the first European nation to hold any real claim over what would become South Dakota. Its claims covered most of the modern state. However, at most a few French scouting parties may have entered eastern South Dakota.Schell, pp 24–26. In 1679 Daniel G. Duluth sent explorers west from Lake Mille Lacs, and they may have reached Big Stone Lake and the Coteau des Prairies. Pierre Le Sueur's traders entered the Big Sioux River Valley on multiple occasions. Evidence for these journeys is from a 1701 map by William De L'Isle that shows a trail to below the falls of the Big Sioux River from the Mississippi River.

After 1713, France looked west to sustain its fur trade. The first Europeans to enter South Dakota from the north, the Verendrye brothers, began their expedition in 1743. The expedition started at Fort La Reine on Lake Manitoba, and was attempting to locate an all-water route to the Pacific Ocean. They buried a lead plate inscribed near Ft. Pierre; it was rediscovered by schoolchildren in 1913.Schell, pp. 27–29.

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