On July 3, 1890, US President Benjamin Harrison signed the Idaho Admission Bill [PDF] into law, making Idaho the forty-third state admitted to the Union. Idaho became a territory in 1863 following the signing of an act of Congress by President Abraham Lincoln. At that time, the Idaho Territory consisted of all of present day Montana and part of Wyoming. A delegation of Idahoans wrote a state constitution on July 4, 1889, that was ratified by popular vote on November 5 of that same year. The inclusion of Idaho as a state was part of a rapid inclusion of western states in the US. Six days later, President Harrison signed a bill admitting Wyoming into the Union. The year prior, he had signed legislation admitting Montana, Washington, North Dakota and South Dakota.
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