On this day one hundred years ago, March 19, 1920, the Treaty of Versailles was rejected by the U.S. Senate for the second and last time. There had been a prior straight vote on the treaty, which was rejected. A second vote included fourteen reservations proposed by Sen. Henry Cabot Lodge. The final vote fell seven votes short of the two-thirds majority needed to ratify.
The war formally ended for America in 1921 when Congress passed the Knox–Porter Resolution.