At this point Serbia, having finally secured monetary aid from Russia, declared war on the Ottoman Empire again. This time there were far fewer Russian officers in the Serbian army but this was more than offset by the experience gained from the 1876–77 war. Under nominal command of prince Milan Obrenović (effective command was in hands of general Kosta Protić, the army chief of staff), the Serbian Army went on offensive in what is now eastern south Serbia. A planned offensive into the Ottoman Sanjak of Novi Pazar was called off due to strong diplomatic pressure from Austria-Hungary, which wanted to prevent Serbia and Montenegro from coming into contact, and which had designs to spread Austria-Hungary's influence through the area. The Ottomans, outnumbered unlike two years before, mostly confined themselves to passive defence of fortified positions. By the end of hostilities the Serbs had captured Ak-Palanka (today Bela Palanka), Pirot, Niš and Vranje.