This was fun. Its December 5th 1915, and Japan just offered white peace to me. In other words, I won the war in a little over a year.
Campaign summary (very hard/very hard):
-Started building 9 transports day one, and put all else into supplies,
-I put 30 of my divisions to defend East Prussia, all others on the west,
-Used only 18 Austrian divisions to guard Serbian border, all others in Galicia and my territory,
-I used extended Schlieffen plan, meaning I also invaded the Netherlands,
-Breaking through Lille and Amiens, I took Paris in october, and France surrendered,
-In those three months, Russia focused on Galicia and managed to bring Romania into war, while I managed to take Warsaw, while the Ottomans joined and I used most of their troops to attack Egypt,
-Schlieffen plan succeeded as Koenigsberg did not fall, I took Paris and Brussels and took 490.000 casualties (10.000 under limit),
-With new transports I invaded Britain before their troops from France were redeployed to London (a window of around 10 days),
-I sent some 24 divisions in Britain on a new front, sent 18 more to Serbia, and with all else reinforced the Eastern front,
-Serbia fell in late december, Bulgaria joined my side and I took undefended Bucharest and Romania surrendered,
-Britain surrendered in march, and I used harsh treaty option,
-With 310 divisions of all Central Powers members I started my grand offensive into Russia on april 1st 1915, and sliced through Russian lines,
-I pushed without pause, and the first revolution happened in august, while the second happened in october,
-I was at Petrograd-Moscow-Volgograd line when Bolsheviks sued for peace in late november,
-Japan (which did capture Qingdao) offered white peace as the last remaining enemy.