Which war led to the ratification of women's voting rights, as it was the time women were significantly involved in the war effort?

World War 1.

- Women worked in factories, business jobs, rallied support, addressed famine problems, and did more for the war effort after men had to leave their jobs for war. Since their posts became empty - but still needed filling - women worked instead. They didn't just work, they worked diligently and with skill. They built aircrafts, sewed uniforms, and did much more than anyone ever expected. President Wilson said "the services of women during this supreme crisis of the world's history have been of the most signal usefulness and distinction. The war could not have been fought without them or its sacrifices endured. It is high time that some part of our debt of gratitude to them should be acknowledged and paid, and the only acknowledgment they ask is their admission to the suffrage.