Map of the the Balkan Front — Germany's Southeast Front — with the mountain passes between Austria-Hungary and Romania. From the Reichsarchiv history of the wars in Serbia and Romania, Herbstschlacht in Macedonien; Cernabogen 1916.The capitals of Belgrade (Serbia), Bucharest (Romania), Sofia (Bulgaria), and Constantinople (Turkey) are prominent, as is Salonica, Greece, the Allied entry port into the country.
Übersichtskarte der Süd-Ost-FrontSkizze I.Erklärungen:Oesterreich UngarnLandesgrenzenOverview map of the south-east front Sketch I. Explanations: Austria-HungaryBorders
"Aided by his heavy artillery, Mackensen smashed through the Roumanian Center with such force that the whole line westward to the Danube gave way. In rapid succession he captured Rasova, Madgidia and on October 25th, he crowned his offensive by the seizure of Cernavoda on the Danube. The Roumanians, after crossing the great bridge at this point, destroyed it, leaving Mackensen in possession of the railroad."
Romania entered the war on August 27, 1916 by crossing the Transylvanian Alps and southern Carpathian Mountains into Transylvania in Austria-Hungary. Within a month, a German and Austro-Hungarian army was driving the invaders back into Romania while, across the small country to the east, a combined German, Bulgarian, and Turkish army under German General August von Mackensen had driven the Romanians back in Dobrudja, a region between the Danube River and the Black Sea. After a pause, Mackensen recommenced his attack on October 25.
King's Complete History of the World War by W.C. King, page 257, copyright © 1922, by W.C. King, publisher: The History Associates, publication date: 1922
1916-10-25, 1916, October, Romania, Rumania