On 30 September, Kolberg was reinforced by several thousand Prussian troops commanded by Dubislav Friedrich von Platen. With the reinforcements, the fortress was defended by nearly 20,000 Prussians. Rumyantsev, who lost naval support on 9 October when the Russian warships sailed home because of bad weather, was reinforced by part of Alexander Borisovich Buturlin's army the same month. His cavalry, commanded by Gustav Berg, cut off Prussian communication lines, countered excursions of Württemberg's 2,700 horse and captured at least four of their units.