 The Germans and Austro-Hungarians wanted to transport munitions down the Danube to the Ottoman Empire, so on 24 December 1914, Bodrog and the minesweeper Almos escorted the steamer Trinitas loaded with munitions, the patrol boat b and two tugs from Zemun past Belgrade towards the Iron Gates gorge on the Serbian – Romanian border. The convoy ran the gauntlet of the Belgrade defences unharmed, but when it reached Smederevo it received information that the Russians had established a minefield and log barrier just south of the Iron Gates. It turned back under heavy fire, and withdrew as far as Pančevo without serious damage to any vessel. Bodrog returned to base, and the monitor SMS Inn was sent to guard the munitions and escort the convoy back to Petrovaradin. In January 1915, British artillery arrived in Belgrade, further bolstering its defences, and Bodrog spent the first months of the year at Zemun. On 23 February, LSL Kosimus Böhm took command. On 1 March, Bodrog and several other vessels including the monitor SMS Körös were relocated to Petrovaradin. After the commencement of the Gallipoli campaign, munitions supply to the Ottomans became critical, so another attempt was planned. On 30 March, the steamer Belgrad left Zemun, escorted by Bodrog and Enns. The convoy was undetected as it sailed past Belgrade at night during a storm, but after the monitors returned to base, Belgrad struck a mine near Vinča, and after coming under heavy artillery fire, exploded near Ritopek. On 22 April 1915, a British picket boat that had been brought overland by rail from Salonika was used to attack the Danube Flotilla anchorage at Zemun, firing two torpedoes without success.
