When did all women get the right to vote?

What does this answer mean?

All women got the right to vote in 1920, with the 19th Amendment. USCIS accepts three answers: 1920, after World War I, or with the 19th Amendment.

The 19th Amendment was ratified on August 18, 1920, less than two years after World War I ended. It says the right of citizens to vote can't be denied or limited because of sex.

It was the result of a long effort. The women's rights movement grew in the 1800s, starting with the first women's rights convention in Seneca Falls, New York, in 1848, where the call for women's suffrage, the right to vote, was made. Leaders such as Susan B. Anthony and Elizabeth Cady Stanton worked for decades for that goal.

Compare it with the 15th Amendment, from 1870, which protected the vote for men of every race. At the interview, say "1920" or "the 19th Amendment."