Wurmser did not count on swift movement by the French. Within two days, Klenau's force retreated in the face of Napoleon Bonaparte and 12,000 Frenchmen; his small advance guard was quickly pushed out of Brescia on 1 August. At the subsequent Battle of Lonato of 2–3 August 1796, the French also forced Quasdanovich's column to withdraw into the mountains, with heavy losses. The mopping up operations lasted until mid-August, isolated Quasdanovich's force by Lake Garda, and freed the French to concentrate on Wurmser's main force at Castiglione delle Stiviere, further south; Bonaparte's subsequent victory against Wurmser at the Battle of Castiglione forced the old commander across the Mincio river and allowed the French to return to the siege of Mantua.