At 9 p.m., Ōyama's orders read, 'I intend to pursue in earnest and to turn the enemy's retreat into a rout.' Kuroki's army was the first to attack, at midnight, followed by Nozu at 3 a.m. Because of the lateral movement of troops to meet the threat from Nogi, combined with the new withdrawal, chaos ensued.
In the rear areas, Russian troops continued looting and getting drunk. Kaulbars' 2nd Army, which was meant to be the hammer to smash the Japanese, was now dispersed across the battlefield in small groups and no longer able to operate as an effective formation. The 1st Siberians were redirected to counterattack Oku and Nogi, but their attack was uncoordinated and failed. A rearguard led by Major General Mikhail Alekseev, defending the left flank along the Hun River, was quickly overwhelmed.
The narrator notes that the Hun River had thawed, which might have given the Russians more time to withdraw, but fortune favored the Japanese. Just as they finished crossing the Hun River, the ice began to break. The 1st and 3rd Manchurian armies' orderly withdrawal disintegrated into chaos, and Bildering's and Linevich's armies were given no pause to recover. To the west, the Russians crumpled against Oku, who, with Nozu's support, opened a gap. A detachment from Nogi had also wrecked the railway north of Mukden and was beginning to deploy a blocking line against the Russian retreat. Rennenkampf sent his cavalry and artillery against the advancing Japanese to slow them, but they quickly reached the northern banks of the Hun River. The Russian defensive line collapsed, and the far edge of the left flank was cut off from the main body.