The next objective to be reached was the Vardar at its confluence with the Cerna, so as to occupy not only the whole of the triangle formed by the two rivers, but to threaten the communications of the enemy troops south of Monastir and in the Cerna loop, as well as on Lake Doiran. The II Serbian Army pushed on towards the lower valley, crossed the Cerna, with the Morava Division (in reserve) between the two, and the 11th Colonial Division advanced echeloned obliquely so as to occupy as great a part as possible of the area to the right of the Cerna. The enemy grasped the seriousness of the situation, and the Command of the XI German Army gave orders to resist at all costs on the Kuchkov Kamen (Hill 1800 north of the Koziak). On the 17th the attacks of the II Serbian Army on that position and further east on the Topolatz, on the Studena Voda (Hill 1201), developed. The enemy resistance was desperate, and their counter-attacks were sometimes successful, but the Serbian advance continued irresistibly, and the enemy abandoned one position after another, losing a great deal of material. General Russoff, Commander of the 2nd Bulgarian Division, was relieved by order of the German Command, and succeeded by General Nikoloff, but neither this change of Command nor the sending of some feeble reinforcements could hold up the advance. On the same day the I Serbian Army attacked the Mount Beshista-Pandeli-Trezia line; on the 18th the Danube Division captured the important bridge of Razim Bey on the Cerna, and the entire army commenced a vast turning movement to occupy the whole of the right bank of the river from Selo-Monastir to Polosko. The Bulgarians defended themselves obstinately, hoping to save their vast depots filled with supplies, but being unable to succeed in this object, they were forced to fall back, burning the bridges between Polosko and Cebren, and everything they could not remove. On the 18th-19th the Danube Division created a bridgehead at Razim Bey on the Cerna, which it afterwards consolidated so as to co-operate with the French and Greeks on the left bank. It was, however, necessary to complete the operation by reaching the middle Vardar, as a frontal advance by Ghevgheli offered serious difficulties. The Serbian Cavalry Division, commanded by Colonel Georgevich, which had been brought to the immediate rear of the Serbian main lines, was now pushed forward to Kavadar, the important road centre a little to the south of the confluence of the Vardar and the Cerna. This was the extreme point reached by the Armée d’Orient in the autumn of 1915. But the advance of the Serbians had been very rapid, whereas the forces on their flanks were still on their old positions, so that an apparently dangerous salient had been created. At the same time the C.A.A. had received information from reliable sources that some German reinforcements had arrived on the Struma front; in fact, a Greek patrol had captured some