100 years is so long ago yet also so recent. So much death and destruction. 10 million dead soliders. So much death and we are still dealing with the fallout of it.
A great grandfather of mine served. He was part of the Argonne offensive, the largest American offensive in history, which pushed this whole thing to reach a ceasefire. But it wasn't true peace, only a 20 year respite. His daughter then served in the second world war. The centuries of savagery of Europeans was finally pacified with American might and surviving Europeans coming together in an economic union. These ties across the Atlantic and across countries have kept the continent largely free of war, and certainly nothing like the world wars has happened since.
If you haven't watched it, the 255pt weekly update on the war on The Great Was channel on YouTube was spectacular. It has specials as well so there is far more content than just a weekly update
Macron lecturing Trump about nationalism was good but it was a good speech in general and worth a watch as well. Having never been to France I didn't realize that the tomb of the unknown solider is under the Arc de Triomphe, where the ceremony took place.