At 9 a.m., the Austrian brigades of Samuel Koblos and Anton Lipthay counterattacked the French forces on the Trambasore Heights. Another column under Prince Heinrich of Reuss-Plauen attempted to turn the French right via the Rivoli gorge. Meanwhile, on the French right flank, Vukassovich had advanced down the east bank of the Adige and had established batteries opposite Osteria. The fire of his guns and the pressure from Quosdanovich forced the French out of the village of Osteria and onto the Rivoli plateau. By about 11 a.m. the position of Bonaparte was becoming desperate: an Austrian column under Lusignan was cutting off his retreat south of Rivoli. To reopen his line of retreat Bonaparte turned to Massena's 18th Demi-brigade ("the Brave"), newly arrived from Lake Garda. Meanwhile, Alvinczi was on the Trambasore Heights urging his victorious battalions forward, though they were unformed by combat and rough terrain.