The Zebrnjak monument was erected in honour of the Serbian soldiers fallen during the Battle of Kumanovo in the First Balkan War in 1912. At that time, the Balkan Union (the Kingdom of Bulgaria, the Kingdom of Greece, Serbia, and Montenegro) opposed the Ottoman Empire. One of the largest battles took place in the vicinity of this small Macedonian town. After the Battle of Kumanovo, the Turkish army was defeated and had to retreat.

The project architect was Momir Korunovich. The monument was installed and consecrated in 1937, 25 years after the bloody fight. The materials used are basalt and reinforced concrete. The memorial was decorated with frescoes depicting scenes of daily life by the Serbian artist Zhivorad Nastasievich.

Unfortunately, the monument severely suffered from the hands of Bulgarian soldiers. Today it stands in a semi-ruinous state, and a tower that once existed here was demolished. The remains of 678 Serbian soldiers lie in the memorial crypt to this day. In 2012, in honour of the centenary of the Battle of Kumanovo, the Serbian Republic government allocated 70 million dinars for restoration work.

Once there was a three-sided pyramidal tower 48,5 metres high with an Orthodox cross installed on its top. According to design, the unusual shape was meant to embody the Orthodox trinity that the fallen soldiers had professed. Besides, three Serbian divisions also took part in the Battle of Kumanovo. The monument was supposed to remind future generations of the price soldiers had to pay to set their country free.

The monument is located on Zebrnjak Hill, the highest point of the battle. Remarkably, when it was created, it was the tallest erection in Yugoslavia and the entire Balkan Peninsula. It was clearly visible from a long distance even at night: three lamps were burning in the tower.