what amendment allowed women to vote

The 19th Amendment to the U.S. Constitution granted women the right to vote. It was passed by Congress on June 4, 1919, and ratified on August 18, 1920. The amendment legally guarantees American women the right to vote, and achieving this milestone required a lengthy and difficult struggle. 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 of the Constitution. Few early supporters lived to see final victory in 1920.