Well, in XIII century, the Turks started invading Balkan. First one attacked was Byzantine, and after fall of Constantinopole, Serbia was second problem on their invade...
The great battle "Battle of Kosovo" took place at ''Kosovo field" at 28.june 1389. That was the main battle which was fatal for Serbian army, because it was said:
"Who don't go to Kosovo field,
shouldn't have childrens ever again,
his fields should never grow,
and should be dammned to the rest of his life!
BRAVE DIE, PUSSIES FLY!!!
So, even outnumbered, Serbian army showed high morale and courage. The grat hero of that battle was Milos Obrenovic, young nobleman who came to the Ottoman sultan, Murat II, and cut open his stomach whith his dagger hidden under belt.
This battle was won by Turks, but many old man still beleve that the victory was ours! After this battle, Turks came north, and after capturing Smederevo (one of our's fortress south of Belgrade) in 1459., Serbia came under direct Ottoman rule.
Anyway, whith so little male persons in country, only resistanse to the Turks was small sporadic fighting by the "robbers, brigands, highwaymans" (in our country they were called HAJDUK, HAJDUCI),.
So, we were 4 centuries under The Turks, (exact 345 years of subjugation) until great hero Djordje Petrovic, well known as Karadjordje, reunited Serbs and in 1804. raised an rebellion in the center of the Sebia, and that revolt lasted nine years, till Ottomans gained control again. Two years later, in 1913, secon great hero Milos Obrenovic, (borned in my neighbourhod), led a secon revolt and within a few months Serbia was free again!
After this ages came castle age....
This is enough, second age is war with Austro-Hungaria....
some another time...
oh yeah then comes the war with YOU!!!
All this written by Djordje Tesic
Actually, it was made in political purpose on anniversary in 1989, ofcourse by Comunist goverment with Slobodan Milosevic in the front. 
