Your challenge, should you choose to accept it, is that:
* with a POD no later than June 28, 1914, the Triple Entente/Allies (chiefly the United Kingdom and France) win in the Great War;
* the war lasts a minimum of two years;
* as many of the monarchies of Germany, Austria-Hungary, Russia, and the Ottoman Empire remain intact for at least twenty years at the end of the war.
Bonus points for:
* preventing the splintering of Austria-Hungary;
* preventing the partition of the Ottoman Empire;
* preventing the accession to power by Lenin.
* preventing fascism from taking hold in Germany and/or Italy, but not necessarily democratization.