During September 23, 1917, the railway line in the Bazza Valley, east of Tolmino, was the objective of Italian air forces. In the morning one of the Italian bombarding squadrons arrived over the railway station of Grahovo, about five or six miles eastsoutheast of Tolmino, at a moment when intense railway movements were going on, and four tons of bombs were dropped there. In the night an Italian airship, by dropping numerous high-explosive bombs, greatly damaged the establishments in the neighborhood of Podmelec, midway between Tolmino and Grahovo. At the same time another Italian airship once again bombarded the numerous Austrian troops in the Chiapovano Valley. In the Monte Nero region, upper Isonzo, the Austrians exploded on September 24, 1917, a powerful mine under Italian positions, upon which they then concentrated violent artillery fire. Prompt and effective barrage fire, hindering the advance of the infantry, prevented the Austrians from gaining any advantage. The damage done was slight. Another let-up set in for the next few days. However, on September 28, 1917, Italian storming troops made a surprise attack toward the southeastern edge of the Bainsizza Plateau, capturing some of the high ground south of Podlaka and southeast of Madoni, and forty-nine officers and 1,360 men. Subsequent violent enemy counterattacks accompanied by heavy bombardment were repulsed and the positions maintained. On the night of September 28-29, 1917, and on the following day, fresh attempts on the part of the Austrians to dislodge the Italians from the positions occupied between Sella di Dol and the northern slopes of Monte San Gabriele failed. On the remainder of the front considerable artillery activity and numerous good patrol actions were reported. Air fighting was very brisk along the whole Julian front. Italian air squadrons bombarded the enemy depots at Berje, northeast of Nabresina, Gulf of Trieste, and during the night the known military works of the fortress of Pola with excellent results. The response of the enemy was vigorous everywhere. The following day, September 29, 1917, Italian troops, by means of another successful surprise attack, rectified their line between the Sella di Dol and the northern slopes of Monte San Gabriele. Eight officers, 216 men, and a few machine guns were captured. The position was maintained and strengthened, not withstanding that the Austrians repeatedly counterattacked.