Here's a short narrative for Dakota, along with the new flag. Most of it amounts to fleshing out a few details of things already posted here or there, and I was pleasantly surprised to see how much there was.
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DAKOTA
The storied name of Dakota calls to mind eagle feathers, herds of buffalo, dusty saloons, long lines of painted warriors and Buffalo Soldiers riding together to fight outlaws and defend the border... but also vast fields of corn, simple village life, boxy limestone parish churches where soft-spoken priests gently guide their close-knit flocks. Contemporary Dakota is famous for a wide-open landscape that contains some of the Confederation's largest nature preserves. Besides the namesake Dakota people, the state is home to dozens of tribal and ethnic groups, some indigenous and others from elsewhere in America and Europe.
Flag
The flag's central design is a medicine wheel, a major cultural symbol throughout the Plains region. Its four spokes and colors primarily represent the four cardinal directions, but they have also been taken to represent different peoples, totemic animals, forces of nature, or aspects of the human psyche. Behind the medicine wheel is a green and white bicolor that suggests both the ASB's confederal flag and the wide prairie landscape.
History
Dakota's institutional origins lie with fur trading companies from Lower Louisiana. Traders were active along the Missouri from early colonial times, but in the early 19th century their activity picked up. Large expeditions began pushing up the river in flatboats, seeking cargoes greater than what canoes could carry. Louisianans established a line of forts along the river, starting a lively interchange with the nations they encountered. These forts eventually became something like a fortified border, with the Louisianans controlling the east bank and newcomers from Mexico and independent operators active along the west. The Louisianais traders were an interesting group. Their state was still basically a Caribbean culture, and the people who decided to try their luck in the vast interior were mostly from the mixed-race lower rungs of society. On the prairies, they began to build a new society, one that has been called "a buffalo pemmican with Creole spices."
Mexican land policies around mid-century encouraged landless peasants to head north to receive large plots in the Great Plains. This influx of homesteaders put pressure on the tribes already living there. Some were driven across the Missouri, where Louisianan agents welcomed them as an augmentation to their alliance. A war against Mexico helped to unite the people of Dakota and promote a common identity. The war's end defined the Missouri as Dakota's western boundary and established a neutral zone in the center of the Plains, which would later become the buffer states of Omaha, Punkah, and Lakota.
In 1863, Louisiana granted more autonomy to its two northern provinces, Upper Louisiana and Les-Arques. Dakota did not yet have a civil government, but this splitting of the Louisiana republic into three provinces pointed toward a future as a separate state. Two years later Dakota's northern border was defined in a treaty between England and the Grand Council of State. In 1872, trading company officials and the leading chiefs asked that the territory be permitted to name delegates to Congress. This marked the effective start of Dakota's life as a state, though the full panoply of statehood took many more years to develop, including representation in Parliament and freedom from the authority of Lower Louisiana.
The 1870s also saw the growth of commercial farming in Dakota. Steel plow technology had already revolutionized agriculture east of the Mississippi and southwest of the Missouri, and from this time it began to catch on in Dakota as well. As in other states of the ASB, the first new farms developed near older Indian villages and within the village social structure. But the sheer size of the land and its great potential for growing crops made it very inviting to outsiders. Dakota's leaders issued ever-larger grants for groups of settlers to build new communities. Prominent among them were Swedish farmers, often led by experienced Lenape-Swedish guides from Christiana and Ohio. By the early 1900s, corn and wheat had replaced the prairie covering much of the state. A growing web of railroads made it possible for farmers to sell their crops, as well as link Dakota to the eastern states, reducing its economic dependence on the Louisianas.