Battle of Serbia (Russo-Islamic World War III)

The Battle of Serbia (Serbian: Битка за Србију Bitka za Srbiju, Russian: Битва за Сербию Bitva za Serbiyu) was one of the first battles fought as part of the Caliphate's attempted re-conquest of the former Ottoman Empire.

After the Battle of Bulgaria, Caliphate forces were free to launch their two-front invasion, one from the east via Bulgaria, and one from the west, via Bosnia, with extensive help from Bosnian forces. Serbia was backed by Russia, like in the old times, and Russians deployed some of their most sophisticated weapons into Serbia.

President Mikhail Budayev, who had suspiciouns of the Caliphate, had already been performing joint-exercises with Serbian forces for a hypothetical invasion.

While the Caliphate did achieve many tactical victories in Serbia, the battle went horribly for the Caliphate forces, with Serbian and Russian forces stationed in Serbia successfully fending off the Caliphate invasion. Thanks to Bulgaria acting as a geographical shield, along with Serbia's preparedness, which bought the Serbian forces time, the Caliphate suffered devastating losses at Serbia's eastern borders.

In addition, Serb paramilitary groups, trained by Serbian and Russian military personnel, also provided devastating firepower for the Serbian military. The three main groups were the New Chetniks and religious Orthodox paramilitary groups, and the Serb Partisans, an irreligious Serb paramilitary group, espousing elements of communism and Titoism.

After the Serbian forces successfully defeated the Sultanate of Bosnia, and forced them to surrender, along with Bulgarian and Russian forces in the east, the Caliphate was forced to fight on the defensive.

The joint Serbian and Russian forces successfully pushed the Caliphate forces back into Bulgaria, where they were attacked by Bulgarian and Russian forces.