The 19th amendment to the Constitution guarantees all American women the right to vote. Achieving this milestone took decades of agitation and protest. Beginning in the mid-19th century, several generations of woman suffrage supporters lectured, wrote, marched, lobbied, and practiced civil disobedience to achieve what many Americans considered a radical change to the Constitution. The 19th amendment passed Congress in June of 1919. Minnesota ratified it on September 8, 1919.
National Archives, Records of the U.S. House of Representatives Used with the permission of the U.S. House of Representatives