The Serbian Third Army was a Serbia

Serbia

Serbia , officially the Republic of Serbia , is a landlocked country located at the crossroads of Central and Southeast Europe, covering the southern part of the Carpathian basin and the central part of the Balkans...

n field army

Army

An army An army An army (from Latin arma "arms, weapons" via Old French armée, "armed" (feminine), in the broadest sense, is the land-based military of a nation or state. It may also include other branches of the military such as the air force via means of aviation corps...

 that fought during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

.

During the First Balkan War

First Balkan War

The First Balkan War, which lasted from October 1912 to May 1913, pitted the Balkan League against the Ottoman Empire. The combined armies of the Balkan states overcame the numerically inferior and strategically disadvantaged Ottoman armies and achieved rapid success...

, the Third Army participated in the Battle of Kumanovo

Battle of Kumanovo

The Battle of Kumanovo or Battle of Kumanova on 23 – 24 October 1912 was a major battle of the First Balkan War. It was an important Serbian victory over the Ottoman army in Vardar Macedonia, shortly after the outbreak of the war...

 (23 - October 24, 1912) along with the Serbian First Army and the Serbian Second Army

Second Army (Serbia)

The Serbian Second Army was a Serbian field army that fought during World War I.During the First Balkan War, the Second Army participated in the Battle of Kumanovo along with the Serbian First Army and the Serbian Third Army and was deployed in the area around Kyustendil...

. It was composed of four infantry divisions and one infantry brigade

Brigade

A brigade is a major tactical military formation that is typically composed of two to five battalions, plus supporting elements depending on the era and nationality of a given army and could be perceived as an enlarged/reinforced regiment...

 (76,000 men), deployed in two groups, the first one at Toplica and the second one at Medveđa. It was assigned to the westernmost attack, with the task of taking Kosovo

Kosovo

Kosovo is a region in southeastern Europe. Part of the Ottoman Empire for more than five centuries, later the Autonomous Province of Kosovo and Metohija within Serbia...

 and then moving south to attack the left flank of the Ottoman Army.

The Third Army was led by Božidar Janković

Božidar Jankovic

Božidar Janković was the Commander of the Serbian Third Army during the First Balkan War between the Balkan League and the Ottoman Empire....

.

1914

• Third Army - staff in the Valjevo
  Valjevo
  Valjevo is a city and municipality located in western Serbia. It is the center of the Kolubara District, which includes five other smaller municipalities with a total population of almost 180,000 people...
  
  
  • I Drina Infantry Division - Valjevo
    Valjevo
    Valjevo is a city and municipality located in western Serbia. It is the center of the Kolubara District, which includes five other smaller municipalities with a total population of almost 180,000 people...
    
    
  • II Drina Infantry Division - Ljubovija
    Ljubovija
    Ljubovija is a town and municipality located in the Mačva District of Serbia. In 2011, the population of the town is 3,946 while the population of the municipality is 14,424.-Municipality:The municipality of Ljubovija includes the following settlements:...
    
    , Krupanj
    Krupanj
    Krupanj is a town and municipality located in the Mačva District of Serbia. The municipality has a total population of 17,398, while the town has a population of 4,455 .-Geography:...
    
    , Loznica (reserve)

• • detachments guarding Drina
    Drina
    The Drina is a 346 kilometer long river, which forms most of the border between Bosnia and Herzegovina and Serbia. It is the longest tributary of the Sava River and the longest karst river in the Dinaric Alps which belongs to the Danube river watershed...
    
    river:
    • Obrenovac detachment
      • 6 infantry battalions
      • 1 cavalry troop
      • 2 artillery batteries
    • Šabac detachment
      • 8 infantry battalions
      • 1 cavalry troop
      • 2 artillery batteries
  • Loznica and Lesnia detachments
    • • 6 infantry battalions
      • 1 cavalry troop
      • 3 artillery batteries
    • Ljubovija detachment
      • 2 infantry battalions III
      • 1 artillery battery
    • Debelo Brdo detachment
      • 1 infantry battalion III
    • Jadar Chetnik detachment - 500 chetniks
    • Rudnik Chetnik detachment - 500 chetniks