When Bonaparte suddenly crossed the Adige River on the morning of 15 November, Mittrowsky lay nearby with three battalions. He played a prominent role during all three days of the Battle of Arcole. By early afternoon on the first day, his troops reinforced the village of Arcole. By virtue of seniority, Mittrowsky assumed command over the soldiers of Colonel Wenzel Brigido as well as his own. His troops stubbornly held the village all day, but the French forced his troops out of Arcole late that evening. He reoccupied the place when Bonaparte withdrew the isolated French force. On the second day, Alvinczi entrusted him with 14 battalions and gave him instructions to drive the French into the Adige. The order proved impossible to carry out because the French were too numerous, but Mittrowsky's capable defense of Arcole on the 16th kept Bonaparte's troops at bay. On 17 November he came close to defeating Bonaparte. The French finally drove the Austrians from the village at 5 pm on the third day, but only after drawing troops from the other wing of their army.