Why did Native American leaders like Black Hawk rebel against the United States during this time?​

Because at the time some of the Native Americans sided with the British.

Explanation:

Most Native American tribes during the War of 1812 sided with British because they wanted to safeguard their tribal lands, and hoped a British victory would relieve the  pressure they were experiencing from U.S. settlers who wanted to push further into Native American lands in southern Canada.

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The Black Hawk War was a conflict between the United States and Native Americans led by Black Hawk, a Sauk leader. ... By the time of the Black Hawk War, the population of the two tribes was about 6,000 people.

Explanation:

answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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