In January, 1918, Woodrow Wilson announced that women's suffrage was urgently needed as a "war measure". The House of Representatives passed the federal woman suffrage amendment 274 to 136 but it was opposed in the Senate and was defeated in September 1918. Another attempt in February 1919 also ended in failure.
In May 1919 the House of Representatives again passed the amendment (304 to 89) and on 4th June 1919 the Senate finally gave in and passed it by 66 to 30. On 26th August 1920 the Nineteenth Amendment was certified by the Secretary of State, when Tennessee, the thirty-sixth and final state needed, signed for ratification.