Did WWI have an impact on women suffrage?
WW1 had some rather major effects when it comes to the aftermath of the war. Firstly, there was the 18th amendment that was ratified (the alcohol ban), which began the whole new era of "the Prohibition".
However, it also had a similar impact on women's suffrage, as the 19th amendment was passed in Seneca Falls, New York in the 1920's, with leaders such as Alice Paul spearheading the movement (https://en.wikipedia.org/wiki/Alice_Paul).
The reason why this occurred, was because women had a rather major part of the contribution (in labour) during WW1. After Woodrow Wilson enabled conscription in the U.S. (to increase the army size to 5,000,000), there were more factory workers needed in order to produce (for military supplies, for U.S. use, and for the exportation of them as well). Since men were either fighting in France, Italy (Venice), or even Russia, women took up the torch of the factory. This is why, after the war, Woodrow (rather reluctantly), decided to grant women the right to vote.