From the Smithsonian:
In the spring of 1913, women in six states had the right to vote in all elections: Wyoming, Colorado, Utah, Idaho, Washington and California. Despite these successes, though, the momentum of the 65-year-old suffrage movement was slowing. It was like a car running on fumes.
Alice Paul decided to give it some gas. Having recently returned to the States from England, where she cut her teeth as a suffragist, the 28-year-old New Jersey native pitched an idea to the National American Woman Suffrage Association. She would organize a suffrage parade in Washington, D.C., strategically timed with the influx of crowds arriving for President Woodrow Wilson’s inauguration, to drum up support for the cause. NAWSA appointed Paul the chair of its Congressional committee and approved her plan, but made it clear that she would have to come up with the money for the parade on her own.
Womens' Suffrage March - wikipedia