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African Americans
Because the settlers and soldiers were forcing them off of their native land. These same settlers and soldiers were also assaulting the culture of the tribes in question, the background culture behind native Europeans is against every Native American belief (in actual practice).
They weren't raciest, the native Americans thought that the white people were disrespecting the land and the white people thought that the native Americans were immoral.
War of 1812 wasn't the first fight against settlers, for example, The French & Indian War. By 1812, Native Americans had several hundred years of lies, broken promises, failed treaties, etc. All the way back to the British promising that settlers would not cross the Appalachian and Allegheny Mountains in PA (but settlers did) or the Blue Ridge Mountains (but settlers did), the "white man" (British, French, Spaniards) did not keep their word. Though depicted as "savages", Native Americans had strong values and more so, peaceful values. They were pushed more than once, and sometimes had to fight back.
The Calvary was first sent to the Great Plains to protect travelers and keep the peace in the area. The Native Americans were increasingly violent against the settlers and travelers.
bear flag revolt- rebellion of american settlers against the californios in 1846
African Americans
Because the settlers and soldiers were forcing them off of their native land. These same settlers and soldiers were also assaulting the culture of the tribes in question, the background culture behind native Europeans is against every Native American belief (in actual practice).
Tecumseh and The Prophet unite Native Americans so that they would go against white settlers.
They weren't raciest, the native Americans thought that the white people were disrespecting the land and the white people thought that the native Americans were immoral.
Mormon settlers generally avoided battles against the Indians. For the most part, the native Americans tended to side with the Mormons when hostilities arose between Mormons and others.
tecumseh
Sadly, the primary effect of Native Americans attacking settlements was to enforce the prejudices of the settlers against them, and to reinforce the image of them as savages, hellbent on destroying civilization.
Native American attacks
They passed it to keep settlers from moving west and, possibly starting another war against the Native Americans.
The Native Americans were treated poorly and discriminated against. Their lands were taken and natural environment ruined.
Neither the British or the Americans originally wanted support from the American Indians, ad it was unclear who the Native Americans would support. Two-thirds of the Iroquois tribes fought with the English against the colonists.