During the Chechen attack, Lechitsky became a member of the left column of the III Siberian Corps and from September 25 to 30 participated in the actions of this corps at Bensihu. At the very beginning of the Mukden operation, as soon as the Japanese attack was discovered against the Tsinchechen detachment, the commander-in-chief sent Major General Danilov (23rd and 24th regiments) from the 2nd Army to support the brigade, which occupied the night of February 15, 1905 position on the Tsandansky heights, near the village of Kudyaz. In these positions, until February 23, Lechitsky, together with other parts of General Danilov's detachment, courageously repulsed all the enemy's attacks, until an order was issued to withdraw the 1st Army across the Yellow River.