Americans have lots of forgotten wars. These are wars that we collectively sort-of pretend never happened. Usually this is because we lost them. A prime example? The War of 1812. The Korean War and Vietnam are both great examples as well. Sure, we aren’t forgetting Vietnam yet, but give us 100 years and most people will have stopped remembering it. Same thing with Afghanistan and Iraq, both of which we lost by any reasonable measure.
World War I is an odd case. We didn’t lose the war, and in fact had total victory by rushing in to the rescue during the third act. But it pushed us in all sorts of weird directions and immediately after the war, it became more-or-less official governmental policy to forget it.
But the war was waging 100 years ago, and it’s important to take some time to remember that, and to understand it.