Following Bulgaria’s entry into the war on the side of the Central Powers on October 14th, 1915, the death knell for Serbia and Romania began to sound. The Bulgarian Summer of 1915 saw the Entente attempt to win the hearts and support of Bulgaria. It was all for naught, as the country entered the war aligned with Germany and her allies. And mobilization soon began, followed by a declaration of war against Serbia. Around this time the Germans and Austro-Hungarians had penetrated into Serbia on a front that was 140 kilometers in length and 15 kilometers in depth. In order to close the 90-kilometer gap between the flanks of the German 11th Army and the Bulgarian 1st Army Mackensen ordered the latter to invade the valley of the river Morava and take Niš and Aleksinac. In accordance with this order the Bulgarians attacked along the entire front of their 1st Army, quickly driving out the Serbian units and taking control of the border area. Following this easy success however the speed of the advance was much reduced due to the bad weather, which turned roads into mud, and a dense fog that sometimes limited visibility to 50 meters. In addition the stiffening Serbian resistance and the mountainous character of the area caused the flanks of the 1st Army to halt before the fortresses of Pirot and Zajecar. The exploits of the Bulgarian 2nd Army in Macedonia convinced the Serbians that the danger of complete encirclement is high and forced them to begin withdrawing their forces to Kosovo while offering stiff but not desperate resistance to Army Group Mackensen. In November, while the decisive Serbian defeat unfolded, the French attempted to exert pressure on the Bulgarian 2nd Army but were soon forced to halt their attempts to drive north. Ownership of ASL-RB, GWASL 1 and all preceding GWASL modules required to play. Scenarios: Pristina Halt - Pristina, Serbia, November 24th 1915 Fall Back To Lerin - Gornichevo, Salonika Front, September 14th 1916 The Dobrich Epopee (Epic) - Southern Dobruja, Romania, September 5th 1916 A Good Field - Dobro Pole, Serbia, September 15th 1918 Chegan Operation - Banitsa, Serbia, August 17 1916 Contested Prophet - Sabac, Serbia, September 30th 1916 Rakija Courage - Gnjilane, Serbia, December 2nd 1915 Show Of Force - Serbia, August 18 1916