In World War I, the second Army fought in the successful Battles of Cer, Drina and Kolubra in 1914. But in Autumn 1915 they were defeated by the Bulgarians and Germans during the Morava and Kosovo Offensives.
The second Army was reestablished at the Macedonian front in 1916 and, after almost 3 years of fighting, was able to take part in the liberation of Serbia in October 1918.
Stepa Stepanović remained commander of the Second Army until 1919.[1]