Determined upon a general attack on all points of the Austrian position, the French army advanced in three bodies upon a space of four leagues in extent. Augereau, at the head of the division which had not fought at Montenotte, advanced on the left against Millesimo; the centre, under Massena, directed themselves upon Dego, by the vale of the Bormida; the right wing, commanded by La Harpe, proceeded by the heights of Cairo, for the purpose of turning Beaulieu's left flank. Augereau, whose division had not engaged at the battle of Montenotte, was the first who came in contact with the enemy. He attacked General Colli on the 13th April. His troops, emulous of the honour acquired by their companions, behaved with great bravery, rushed upon the outposts of the Sardinian army at Millesimo, forced, and retained possession of the gorge by which it was defended, and thus separated from the Sardinian army a body of about two thousand men, under the Austrian General Provera, who occupied a detached eminence called Cossaria, which covered the extreme left of General Colli's position. But the Austrian showed the most obstinate courage. Although surrounded by the enemy, he threw himself into the ruinous castle of Cossaria, which crowned the eminence, and showed a disposition to maintain the place to the last; the rather that, as he could see from the turrets of his stronghold the Sardinian troops, from whom he had been separated, preparing to fight on the ensuing day, he might reasonably hope to be disengaged.[103] Buonaparte in person came up; and seeing the necessity of dislodging the enemy from this strong post, ordered three successive attacks to be made on the castle. Joubert, at the head of one of the attacking columns, had actually, with six or seven others, made his way into the outworks, when he was struck down by a wound in the head. General Banel, and Adjutant-general Quénin fell, each at the head of the column which he commanded; and Buonaparte was compelled to leave the obstinate Provera in possession of the castle for the night. The morning of the 14th brought a different scene. Contenting himself with blockading the castle of Cossaria, Buonaparte now gave battle to General Colli, who made every effort to relieve it. These attempts were all in vain. He was defeated and cut off from Beaulieu; he retired as well as he could upon Ceva, leaving to his fate the brave General Provera, who was compelled to surrender at discretion. [Sidenote: ACTION OF DEGO.]