The 1917 Women's Suffrage Referendum in NYC, a major victory for suffragets fighting for the right for women vote in the nation overall, this victory was a watershead moment that helped in the movement's momentum in getting the 19th amendment of the US constitution passed.
Succeeding after a Prior 1915 Statewide Referendum had failed; NYC was crucial for this win, as without it and New York's other cities, the referendum would have failed—likely dealing a setback to the Women's suffrage movement.
After this win, Suffragettes would use the momentum for a major suffrage drive to pass the 19th amendment, which would succeed the following year and be rattified in 1920.