Battle of Liaoyang
While the Japanese Army settled down in front of Port Arthur for a siege, a large force under Field Marshal Oyama moved north to secure the strategically-located rail junction of Liaoyang, on the Mukden–Port Arthur spur of the China Far East Railway, in Manchuria.
The battle began on 25 August 1904, with the 158,000 strong Russian armies, attempting to turn the flanks of the Japanese First, Second and Third Armies totaling 125,000 men.
On 26 August 1904, the Japanese First Army took Kosarei Peak and Hung-sha Pass southeast of Liaoyang city after a hard-fought action. General Alexei Kuropatkin, commander-in-chief of the Russian armies, believed that he had been beaten and withdrew from the outer Russian defense line, with the Japanese in pursuit.
From 29-30 August 1904, the Russian troops managed to repel intense Japanese assaults on the main defense lines south of Liaoyang. By 31 August 1904, the Japanese First Army was crossing the river northeast of Liaoyang,
On 4 September 1904, after a few days of ineffectual counterattacks, Kuropatkin decided to evacuate Liaoyang for Mukden in the early morning. The unfortunate city was then sacked in succession by Russian, Chinese, and Japanese forces.
Battle of Liaoyang at Wikipedia