Final answer:
Officially obtaining the right to vote for women in the United States required a series of steps: approval by the Senate and ratification by at least three-fourths of the states. This process was completed in 1920 with the ratification of the women's suffrage amendment.
Step-by-step explanation:
Officially obtaining the right to vote for women in the United States required a series of steps. By 1919, thirty states and territories had approved women's suffrage in at least some elections, and half of those recognized the right of women to vote in all elections. This led to the approval of a women's suffrage amendment by the Senate in 1919. The final step was ratification by at least three-fourths of the states, which was achieved in August 1920 when Tennessee became the thirty-sixth state to ratify the amendment.