The Italians continued their advance along the Posina front on June 30, 1916, despite the violent fire of numerous Austro-Hungarian batteries dominating Borcola Pass, and also Monte Maggio and Monte Toraro. Italian infantry occupied Zarolli in the Vallarsa, north of Mattassone. On the left wing, overcoming stubborn resistance, Italian troops scaled the crest of Monte Cosmagnon, whose northerly ridges they shelled to drive out the enemy hidden among the rocks. On the Sette Comuni Plateau they kept in close contact with Austrian positions. Conflicts in the densely wooded and rocky ground were carried on chiefly by hand grenades. Between the Adige and the Brenta the Italians continued their offensive vigorously on July 1, 1916. In the Vallarsa infantry began an attack on the lines strongly held by the Austrians between Zugna Torta and Foppiano. Italian artillery shelled Fort Pozzacchio. On Monte Pasubio the Austrians were offering stubborn resistance from their fortified positions between Monte Spil and Monte Cosmagnon. Along the Posina-Astico line Italian forces completed the conquest of Monte Maggio and occupied the southern side of Monte Seluggio. On the Asiago Plateau there were skirmishes on the northern side of the Assa Valley. On July 2, 1916, in the region of the Adige Valley, the Austrians directed a heavy bombardment against the Italian positions from Serravalle, north of Coni Zugna to Monte Pasubio. Some shells fell on Ala. Italian artillery replied effectively. The infantry fighting on the northern slopes of Pasubio was continued with great violence. In the Posina Valley Italian troops occupied the spur to the northwest of Monte Pruche, Molino, in the Zara Valley (northwest of Laghi), and Scatolari, in the Rio Freddo Valley. The operations against Corno del Coston, Monte Seluggio, and Monte Cimono (northwest and north of Arsiero), the main points of Austrian resistance, were continued. On the Asiago Plateau Italian detachments were pushed forward beyond the northern edge of Assa Valley. On the remainder of this sector there was a lull in the fighting, preparatory to further attacks on the difficult ground. In the Brenta Valley small encounters took place on the slopes of Monte Civaron north of Caldiera. Monte Calgari, in the Posina Valley, was occupied by the Italians on July 3, 1916, while other detachments completed the occupation of the northern edge of the Assa Valley on the Asiago Plateau. Between the Adige and the Brenta the Austrians on July 4, 1916, contested with great determination the Italian advance and attempted to counterattack at various points. After several attempts, Alpine troops reached the summit of Monte Corno, northwest of the Pasubio. In the upper Astico Basin they captured the crest of Monte Seluggio and advanced toward Rio Freddo.