The goal of the offensive of the Austro-Hungarian units in autumn 1915 was to cross the Danube and the Sava rivers and occupy the Kneževac - Ritopek - Avala hill line.

New trenches were then dug for the kneeling position on the very line of the river bank: German artillery would shooting on their targets aiming the square perimeters, starting a few tens of meters from the shore.

The Third Austro-Hungarian Army consisted of 130 infantry battalions, 136 artillery batteries, 4 aircraft divisions, as well as a Imperial and Royal Danube Flotilla with 9 monitors and 20 other ships.

Due to relatively weak resistance from Serbian defenders, the Austro-Hungarian and German forces started to cross the Danube two days later, on October 7, in the area of Ada Ciganlija and at the foot of Kalemegdan Hill, with Belgrade Fortress on the top.

At the same time, the defenders were pushed from Ada Ciganlija and Banovo brdo locations, from where they retreated towards Zvezdara quarter and later seat of Faculty of Law.

Shortly later General Mihailo Živković, the commander of the defense of Belgrade, ordered a Serbian retreat to the line Brestovik - Parcanski visovi.

Few days before, on October 14, Bulgarian Army attacked Serbia during the Morava Offensive, therefore the Serbian Moravian Division was transferred to the newly opened front.

The city was liberated at the very end of World War I on 1 November 1918, after more than three years, by Serbian and French troops under the command of Marshal Louis Franchet d'Espérey of France and Crown Prince Alexander of Serbia.