“WW1 set the stage for WW2, because the Germans were embarassingly defeated, and forced to disarm and abide by various humiliating sanctions imposed by the Treaty of Versailles. This caused Hitler to steam and stew, and he looked for a scapegoat. He invented the concept that it was not the Germans that lost, but rather that the Jews in Germany had betrayed Germany and stabbed them in the back. It was an internal collapse. WW2 was to get “revenge” on the Jews for this defeat. “
Thanks Pashuteh, this is what my Rov told us, and I was confused on the date, but you are correct, WWI broke out on 9 Av. THAT is no coincidence. And it certainly is part of the Three Weeks.