Today in 1919, the signing of the Treaty of Versailles, which ended the massive conflict known today as World War I and set a lot of postwar international standards, including standard musical pitch.
Today in 1943, the US announced it would start rationing shoes to save rubber and leather for the troops in World War II. People on the home front found ways to make shoes out of alternative materials.
This is about the time we were all supposed to be gearing up for the 2020 Summer Olympics and Paralympics. Since that's on hold, let's instead talk about the Inter-Allied Games, which began in Paris on this day in 1919.