World War I ended at “the 11th Hour of the 11th Day of the 11th Month” in 1918. The world, especially Europe, never recovered from WWI. One led inexorably to WWII, which led to the cold war, and so on. I recall back when I was a kid that people still called this day Armistice Day.
To be clear, I'm not a veteran. My father fought in WWII, but there was no real family tradition of enlisting in the military (both mom and dad were the first of their families born in America - there was no time to have a tradition) so enlisting was not something I thought about doing.
I have deep respect for those of you who served. You allow me to sit here and write this.