"But is it "reminding ourselves not to do it again""
Obviously not, from the fact that there is not a year since at least the end of W.W.1. when a war hasn't been taking place somewhere on the planet.
Perhaps it would be worth commemorating the fallen by reiterating exactly what these 'official' wars are - basically, young people being shipped off, often forcibly, under threat of punishment, to kill other young people they have never met and have no quarrel with at the behest of politicians.
Not going to happen of course - too many interests at stake.
Jim Carroll