The road to women's suffrage had been a long one. The injustice stems back to the country's very beginnings, with the Declaration of Independence stating specifically that "all men are created equal."

Throughout the 19th century, women such as Susan B. Anthony, Elizabeth Cady and Sojourner Truth crusaded for women's right to political expression. In 1884, Belva Ann Lockwood became the first woman ever to run for president, running at the head of the National Equal Rights Party. She received 4,149 votes in six states.

Progress came slowly but gradually. In 1893, Colorado became the first state to officially give women the right to vote.

The suffrage movement picked up steam in the 20th Century. In 1912, Theodore Roosevelt's Bull Moose Party became the first national political party to adopt a women's suffrage plank.

Finally, Congress passed the 19th Amendment -- guaranteeing the right of every American to vote regardless of gender -- to the U.S. Constitution on June 1919. On Aug. 26, 1920, the amendment was enacted.