The Battle of Kumanovo was a major battle of the First Balkan War. It was an important Serbian victory over the Ottoman army in the Kosovo Vilayet, shortly after the outbreak of the war. After this defeat, the Ottoman army abandoned the major part of the region, suffering heavy losses in manpower (mostly due to desertions) and in war materiel.^[27]

The Ottoman Vardar Army fought the battle according to plan, but despite this, suffered a heavy defeat. Although Zeki Pasha operationally surprised the Serbian command by his sudden attack, the decision to act offensively against the superior enemy was a grave error which determined the outcome of Battle of Kumanovo.^[28] On the other side, the Serbian command started the battle without plans and preparations, and missed the chance to pursue the defeated enemy and effectively end the operations in the region, although it had the fresh troops of the rear echelon available for such action. Even after the end of battle, the Serbs still believed that it was fought against weaker Ottoman units and that main enemy forces were on Ovče Pole.^[28]

Nevertheless, the Battle of Kumanovo was a decisive factor in the outcome of the war in the region. The Ottoman plan for an offensive war had failed, and the Vardar Army was forced to abandon much territory and lost a significant number of artillery pieces without the possibility to reinforce, because the supply routes from Anatolia were cut.^[28]

The Vardar Army was not able to organise the defense on Vardar River and was forced to abandon Skopje, retreating all the way to Prilep. The First Army advanced slowly and entered Skopje on 26 October. Two days later, it was strengthened by Morava Division II, while the rest of the Third Army was sent to Western Kosovo and then through northern Albania to the Adriatic coast. The Second Army was sent to aid the Bulgarians in the Siege of Adrianople, while the First Army was preparing for an offense towards Prilep and Bitola.^[29]