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Idaho was in land that was contested between the United States and Great Britain. Under President Polk, the treaty of 1846 settled the boundary of the United States and what is now Canada. Idaho became part of Oregon and Washington territories. After Oregon became a state, boundaries were redrawn and in 1859 both parts of Idaho were reunited. In 1863, it became Idaho Territory and then a state in 1890.

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7y ago

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