Albanian–Yugoslav border war (1921)

Albanian–Yugoslav border war
Part of the Interwar period

     Albania      Yugoslavia
     Territories seized by Yugoslavia      Republic of Mirdita
Date17 July – 20 November 1921
Location
Result
  • Yugoslav military victory
Territorial
changes
Minor border adjustments in favor of Yugoslavia; incorporation of Gora, Had, Debar and surroundings into Yugoslavia
Belligerents
Principality of Albania
Diplomatic Support:
 Italy
League of Nations
Kingdom of Serbs, Croats and Slovenes
Kingdom of Greece
Republic of Mirdita
Army of Wrangel
Commanders and leaders
Pandeli Evangjeli
Ahmet Zog
Peter I #
Alexander I
Constantine I
Marka Gjoni 
Pyotr Wrangel
Strength
Unknown troop strength Unknown troop strength
1,200–12,000
1,200 Russian Mercenaries
Casualties and losses
Unknown number of casualties Unknown number of casualties

The Albanian–Yugoslav border war of 1921 arose from disputes over the borders of the newly established Principality of Albania after the First Balkan War. Although the 1913 Treaty of London outlined general territorial terms for Albania, precise borders remained unresolved amid the chaos of World War I, the Paris Peace Conference, and the League of Nations' formation. With the League failing to reach a verdict for a year, Yugoslavia, spurred by the Mirdita rebellion, asserted territorial claims and deployed troops to the border. As tensions escalated, League intervention became imperative. The conflict concluded after the United Kingdom recognized Albania, prompting Yugoslavia to withdraw its forces. Subsequently, diplomatic ties were established between Albania and Yugoslavia, leading to Yugoslavia's acknowledgment of Albanian sovereignty.