We fought for Kosova in 1389 against Otomans empire.Where were you back then.
The Battle of Kosova in 1389 was led by the Serbs , but it was actually a Balkan coalition against the Turks. In addition to Serbs, there were also Croatians, Greeks, Vlachs, Albanians, etc. fighting to defend the Balkans from the Ottoman Empire.
However, the reason that battle was lost was because one of the Serbian leaders (which had a Turkish brother-in-law leading the battle) defected to the side of the enemy. Yes , a Serbian leader joined the Turks with a sizeable portion of Serbian troops at a critical point in the battle, thus allowing the Turkish side victory.
Albanians were unified during the 15th century under Gjergj Kastrioti to fight the Turks , while the Serbs were paying tribute , not powerful enough to lift a finger against the Ottomans. 10 years after his death, Albania was conquered by the Ottoman Empire, and kept under Ottoman control for almost 5 centuries. Sure there were rebellions, but they weren't enough to completely defeat the strongest army in the world.
Balkans in 1815:
1856-1878
Here is a map of Eastern Europe at 1878:
See where the Serbian aspirations are? That is the land they tried to claim for their own.
This is a good one. See where it says ancient boundaries (which even today are ethnically Albanian) and boundaries after a European Treaty that gave Albanian land to its neighbors?
This is a map:
In red is modern-day Albania with the international borders that the world recognizes, and is part of the ethnic Albania that exists today, the Albania that existed BEFORE the European Leaders split up Albania and gave part of the land to Montenegro, Serbia, Macedonia, and Greece.
Those maps are English, German, Italian, and French. They prove the point better than your propagandic claims based on false nationalistic myth.