The 4th Army Brigade (Serbian: 4. бригада Копнене војске, romanized: 4. brigada Kopnene vojske) is a mixed (mechanized infantry and armoured) brigade of the Serbian Army.

[1] Brigade is concentrated in southern Serbia, mainly in Pčinja.

The 4th Army Brigade continues traditions of the 1st Infantry Regiment "Prince Miloš the Great".

The 1st Infantry Regiment "Prince Miloš the Great" was formed in 1897 and has existed until 1941 i.e. after the German attack on Yugoslavia and country's subsequent defeat.

On that day in 1878, Vranje was liberated from Ottoman occupation, and on that date in 1897 the 1st Infantry Regiment "Prince Miloš the Great" was formed.