As Bennigsen hurriedly assembled his army at Jonkowo, elements of Marshal Nicolas Soult's IV Corps reached a position on his left rear on 3 February. That day General of Division Jean François Leval clashed with Lt. Gen. Nikolay Kamensky's 14th Division at Bergfried (Berkweda) on the Alle (Łyna) River, which flows roughly northward in the area. The French reported 306 casualties while claiming to inflict 1,100 on their adversaries. After seizing Allenstein (Olsztyn), Soult moved north on the east bank of the Alle. Meanwhile, Napoleon threatened Bennigsen from the south with Marshal Pierre Augereau's VII Corps and Ney's forces. Kamensky held the west bank with four Russian battalions and three Prussian artillery batteries. After an initial attack on Bergfried was driven back, the French captured the village and bridge. A Russian counterattack briefly recaptured the bridge. That night the French remained in possession of the field and Soult claimed that he found 800 Russian dead there. Marching at night, Bennigsen retreated directly north to Wolfsdorf (Wilczowo) on the 4th. The next day he fell back to the northeast, reaching Burgerswalde on the road to Landsberg (Górowo Iławeckie).