On April 2, 1917, Jeannette Rankin, a Republican from Montana, took her seat in the U.S. House of Representatives.
The first woman ever elected to Congress, she became the only member to vote against U.S. entry into both world wars and later protested the Vietnam War.
Though women in the United States weren’t granted the right to vote for three more years with passage of the 19th amendment, women in Montana, Wyoming, Utah, and Washington had full voting rights before statehood.
Rankin was instrumental in passing laws that made married women citizens in their own right.
The description above is from peacebuttons.info.
Rankin is featured in the “Unsung Heroes: Encouraging Students to Appreciate Those Who Fought for Social Justice” lesson for middle and high school.