And if you consider the Japanese invasions of China, the war started years ago from this date in 1940.
This thing did not start overnight. I know YOU know that, but others might want to think back to around the time of 9/11 s the starting dates. And consider that the US would still be out of the direct war until NEXT December, and then not fully engaged for another six months or so from that date.
I'm sure there are others too that some could debate, these are just the ones off the top of my head.