Delete Ottoman Emprie and add Bulgaria 80% from teritory of ottoman empire in the game is Bulgarian in this time period.Bulgarian army has a 800000 soldiers in the end of war.And the most important battles on balkans are bulgarian
http://en.wikipedia.org/wiki/Battle_of_Doiran Bulgaria alone against UK,Greece,France and Serbia and Bulgaria wins
and see this from wikipedia
The Balkans Campaign of World War I was fought between Central PowersBulgaria, Austria-Hungary and Germany on one side and the AlliesSerbia, France, Russia, the United Kingdom, Montenegro (and later Romania and Greece, who sided with the Allied Powers) on the other side.
Although Bulgaria, in alliance with Germany, Austria-Hungary and the Ottomans, won military victories against Serbia and Romania, occupying much of Southern Serbia (taking Skopje in October), advancing into Greek Macedonia, and taking Dobruja from the Romanians
See the macedonian front http://en.wikipedia.org/wiki/Macedon...t_(World_War_I)
550 000 bulgarian and 18000 germans and 0 turks
In Romania bulgaria conquer Bucharest romanian capital
http://en.wikipedia.org/wiki/Battle_of_Bucharest
ADD BULGARIA
Bulgarian flag 
Bulgarian army flag
There are some bulgarian troops from this time