Spotted Tail (1823–1881),was a prominent leader of the Sicangu Lakotas during a time of conflict and change. He left his mark on the Northern Great Plains as he was not a hereditary chief but developed his standing over time, first proving himself a capable warrior and later a persuasive negotiator. As white settlers encroached on Indian lands in ever-greater numbers, Spotted Tail decided to forgo engaging in prolonged conflicts with the United States, including those led by Red Cloud and Crazy Horse. Instead, he determined to negotiate with the United States to secure a homeland, education, employment, and other necessities essential to the future of his people.