Military operations After the quick collapse of the Serbian offensive on all fronts (July 2-11th 1876), Serbian eastern and southern armies were pushed back (July 15-August 6), and the Ottoman forces took
Zaječar and
Knjaževac. However, Ottoman eastern army was unable to push further into Serbia proper on the eastern front, due to very rough and impassable mountain terrain of the eastern
Serbia. In fact, although the Ottomans have successfully occupied the
Timok Valley (two counties of Zaječar and Knjaževac), the only route from there into the rest of Serbia was through but two mountain passes (
Čestobrodica and
Bovan Gorge), which were already fortified and heavily defended by the Serbian eastern army. So, the main Ottoman army (some 60,000 strong) had to attack from the south, from its base at
Niš through the
Morava Valley. However, the Serbian southern border and the Morava Valley were defended by heavily fortified towns of
Aleksinac and
Deligrad, where was also the base of the main Serbian army, some 68,000 strong, with more than 100 cannon. The eastern side of Aleksinac was defended by the strong fortifications on the Rujevica hill (armed with 8 cannon and 6 mortars), closest to the town, a small redoubt on Šumatovac hill some 2.5 km to the northeast, and a weak redoubt at Prugovac, further 3.5 km to the northeast. Between Šumatovac and Prugovac was the wooded Šumatovac hill, with no Serbian fortifications at all. Šumatovac redoubt was a small 5-sided field fortification on a rocky outcrop, some 300 m from Šumatovac hill, that dominated the valley between Rujevica and Šumatovac hill. Rujevica was heavily fortified, while the wooded Šumatovac hill had no other Serbian positions except the small Prugovac redoubt further 3.5 km to the northeast. On the eve of battle, Šumatovac hill was defended by two companies (300-400 soldiers) of the Kragujevac Second class brigade, four 4-pounder guns and 2
howitzers. Against these Serbian forces came the Ottoman army from
Niš, some 30,000 strong, attacking the Aleksinac position from the east and forcing its way through the valley between Rujevica and Šumatovac hill, with nothing but small Šumatovac redoubt to stop them. == Battle ==