On the 12th the British made an advance over on the right section of the front; nothing of any real importance had occurred over here since the supposed advance had begun, but there had been a great deal of noise from the artillery on both sides. On this date the British reached Seres, but were held back by the Bulgarians, who had previously driven out the Greek garrison and occupied the forts in the immediate neighborhood. These positions the British now began hammering with great vigor, with their biggest guns, though without any immediate result.
At the end of the third week of the month the Serbians, under General Mischitch, made another drive ahead and succeeded in penetrating the enemy's lines for a distance of two miles, taking Velyselo, and a day later Baldentsi. At the beginning of this battle, which lasted two days, the advantage rested with the Bulgarians. They held the higher line beyond the Cerna River, whose slopes were so steep that they could roll huge bowlders down on the attacking parties. After a two hours' artillery preparation early in the morning, the Serbians suddenly sprang forward with loud cheers and rushed the heights. From the rear they could be recognized at a great distance, on account of the large square of white calico which each man had sewn to the back of his coat, and the leaders carried white and red flags with which to indicate the farthest point reached, so that the artillery in the rear could see and avoid shelling them. While the Serbians stormed one crest, the artillery pounded the crest just beyond. Finally all the crests were covered by little fluttering red and white flags, while the Bulgarians fled headlong down the opposite slopes. On the following day a period of very bad weather set in and drowned further operations in a deluge of rain.
On the 21st came another report from Rome of some significance. In the Iskeria Mountains east of Premeti an Italian detachment occupied Lyaskoviki, on the road from Janina to Koritza. The latter town marks the racial boundary between the Bulgarian and Albanian countries. To the eastward was the rough country of Kastoria in which the Russians were operating. In other words, the Italians were emerging from Albania and were getting within reach of the Macedonian field of operations. In fact, on the 29th it was reported that this Italian expedition had linked up with the extreme left of the Allied wing, but this report must have been quite premature; it still had some very rough country to traverse before this could be accomplished. The end of the month saw a lull in the operations in the entire Macedonian theater on account of the bad weather.