As the fog lifted, more boats of all sizes and shapes, protected by the Austro-Hungarian monitors, joined the landing. By midday, the entire 217th Division was safely deployed in Romania. The badly outnumbered Romanians, two militia companies, fled north. By the end of the day, a total of 17 battalions had been ferried across the river. The Austro-Hungarian engineers began assembling the bridge. On the 24th, Bulgarian infantry was also ferried across the Danube. On that same day, the first serious Romanian counterattack against the bridgehead took place. German artillery easily dispersed the attacking infantry. That night, the bridge was finished. The artillery was taken across the bridge on the 25th, followed by the Turkish 26th Division. On that same day, Alexandria was reached and secured by the Germans. When August von Mackensen advised the German Supreme Command of his progress, Paul von Hindenburg named him the commander of all forces within Romania and designated the units that had crossed from Bulgaria the "Danube Army". Falkenhayn's 9th Army was subordinated to Mackensen's overall command. Taking place between 23 and 27 November, this battle was the only real Romanian victory during the debacle. On 23 November, after the Romanian 1st Army received its new commanders – General Constantin Prezan and his talented operations officer, Captain Ion Antonescu – the Romanians managed to halt three German infantry divisions west of the Olt River, as they attempted to converge on Slatina. However, German Cavalry had crossed the southern Olt on that same day, turning the Romanian left flank, while more German troops were coming from the north, threatening the Romanian right flank. In these conditions, the Romanians had to abandon the Olt line on 27 November, but not before blowing up Slatina's granaries and its railway bridge. Despite making "terrific efforts", it was only on that same day (27 November) that the Germans had finally crossed the Olt at Slatina. The Romanians had achieved a strategic success, blocking the German forces which were supposed to join the left flank of Mackensen's Danube Army from reaching their objective in meaningful time. On 30 November, just before the heavy Romanian attack on Mackensen's exposed left flank, the Germans that the Romanians had halted at Slatina for days were still 50 miles away. The Romanian division occupying the Hungarian town of Orsova (now Orșova, Romania), under Colonel Anastasiu, started retreating on 25 November, leaving the town behind.