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They had no goods to trade
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The famous Sioux chief Sitting Bull was mistakenly believed to be a ghost dancer and was killed during an arrest by reservation police. This event would raise tensions in the reservation. Later a fight would break out between American soldiers and a small group of Ghost dancers were the soldiers would go on to kill around 150 innocent Indians including women and children that was then known as the Wounded Knee Massacre.
Answer:
pipes is to water hope this helps