Garrison duty in Mongolia By an order of 19 March 1940, the division was reorganized as the 57th Motor Rifle Division. Around the same time, the 234th Howitzer Artillery Regiment was disbanded. As a motor rifle division, it included the 80th, 127th, and 293rd Motor Rifle Regiments, and the 105th Artillery Regiment. After Galanin was sent west to command a rifle corps in June, Colonel
Dmitry Samarsky took command in July. In July, the 57th became part of the Transbaikal District's newly formed
17th Army. On 1 November, it fielded 11,957 men with 19 anti-aircraft machine guns, seventy-one 45 mm guns, thirty-four 76 mm guns, twenty-four 122 mm guns, twelve 152 mm guns, two
BT tanks, five
T-26 tanks, nine other tanks, and 753 trucks, among other equipment. Following the beginning of
Operation Barbarossa, the German invasion of the Soviet Union, on 22 June 1941, the division remained with the 17th Army in Mongolia. It sent reinforcements to the front during the war. Samarsky was sent to the
Eastern Front to become chief of staff of a field army in February 1942. He was replaced by the chief of the 17th Army cadre department, Colonel
Ivan Khokhlov. Colonel
Viktor Nikiforov (promoted to Major General 16 October 1943) took command of the division in July 1943, after Khokhlov was sent to study at the
Higher Military Academy. In September, the 57th was subordinated to the newly formed
85th Rifle Corps of the army. Nikiforov was promoted to command the corps in April 1944, and was replaced by division deputy commander Lieutenant Colonel
Nurey Zakirov, who was promoted to colonel on 10 August 1944.
Soviet invasion of Manchuria For the
Soviet invasion of Manchuria, the division became part of the newly arrived
6th Guards Tank Army on 17 July 1945. The 127th Regiment handed over its border positions in the Khamar-Daba area to troops from the
39th Army on 19 July and camped on the eastern outskirts of Tamsagbulag. Three companies from the regiment were detached to protect airfields. On 21 July, it was subordinated to the commander of the army's
9th Guards Mechanized Corps. During this period, the division conducted training and was brought up to full readiness in weapons, ammunition, equipment, and vehicles. Officers surveyed the jumping off positions for the attack, while the division's units were alerted for combat. On 28 July, the corps ordered the division to move to new positions near wells northeast of Lake Khala-Gaita-nur. At 15:00 on 28 July the division began the march via two routes and by 8:00 on 30 July had reached the new positions. There, the 1st and 2nd Separate Tank Battalions with
BT-7 light tanks were operationally subordinated to the division. On 5 August, to prepare the jumping off positions, the advanced battalions of the three motor rifle regiments were withdrawn from Heights 935 and 941.1 on the Manchurian border. On the night of 7 to 8 August, elements of the division made a night march from the area of Height 752, north of the jumping off positions, and by the morning of 8 August had reached the jumping off positions. The invasion began on 9 August; the operations that the division participated in became known in Soviet historiography as the
Khingan–Mukden Offensive. The division took two routes across the border, led by a reinforced forward detachment on each route. The first forward detachment, advancing along the rightward route from Heights 938 and 952, Ikhe-Sume, Toyromo-Pomunur, and the western outskirts of
Bayan-Khoshun-Sume, included the 80th Regiment, supported by the 3rd Battalion of the 105th Artillery. By the end of the first day of the invasion, the first detachment was to reach a line on the south coast of Lake Surin-nur and Tametyamuso while covering the advance of the main forces of the division at Bayan-Khoshun-Sume. The second forward detachment, advancing along the leftward route from Heights 951, 877, 781, and 776, Senpokandzieru, and Pakasunur, included the 127th Regiment, supported by the 2nd Battalion of the 105th. By the end of the day, it was to advance to the line of Tametyamuso and Arakhorutok, covering the advance of the division's main forces. The advance detachments crossed the border at 00:05 on 9 August. The main force consisted of the 293rd Regiment, the 1st Battalion of the 105th, the division headquarters, and support units. It advanced on the leftward route and was tasked with capturing Bayan-Khoshun-Sume by the end of the day, crossing the border at 04:30. By the end of 9 August, the division's advance detachments and main force units had entered Bayan-Khoshun-Sume after a march, although the 293rd took two more days to reach the settlement. On 10 August, units of the division continued their march into the foothills of the
Greater Khingan mountains, in difficult conditions via of sandy roads with no water sources. On 12 August, units of the division, crossing the Greater Khingan via the Karakhon Pass, halted in the pass, where they put themselves in order and allowed time for slower-moving units to catch up. The units of the division also received supplies of fuel and rations. US supplied
Studebaker and Ford trucks arrived to help speed the advance. On 13 August, in accordance with a verbal order from the division commander, the units of the division took the route from
Jarud to Lupei at 03:00. Despite rain and mud, the division marched to Lupei by the end of 14 August, where it concentrated. At Lupei the units turned over their trucks. On 15 August the division commander ordered elements of the division to continue on foot until more trucks could be received. The 57th continued the march from Lupei to
Kailu and
Tongliao. Due to a shortage of fuel, the 542nd Separate Anti-Aircraft Artillery Battalion, the 76th Separate Medical-Sanitary Battalion, and a repair company were left behind at Lupei. By the end of the day, the units of the division were concentrated south of Lupei at the village of Khoroail. On 17 August, the 105th Artillery Regiment and the other artillery units were left behind with their transport due to a shortage of fuel. The motor rifle regiments and the 15th Separate Reconnaissance and 24th Separate Sapper Battalions continued to march towards Tongliao, following the route of Suburrga-Sume, Khorgot, and Ere Modo. The division's motor transport followed the route of Khroail, Kailu, and Tongliao. At 12:00 on 22 August elements of the division reached Tongliao, where they rested for three hours. By an order of the 6th Guards Tank Army commander on 20 August, the division was to have two of its motor rifle regiments, with reinforcements, concentrate in
Mukden by the end of the day on 28 August, leaving a regiment behind in Tongliao for garrison duty. The 293rd Regiment and 180th Anti-Tank (Tank Destroyer) Artillery Battalion were left behind in Tongliao, while the 80th and 127th Regiments, the 24th Separate Sapper Battalion, and the motorcycle company of the 15th Separate Reconnaissance Battalion were ordered to reach Mukden by the end of 28 August. These units formed an operational group of the division. By the morning of 29 August, the operational group arrived in Mukden and was quartered in a
gymnasium, where the Japanese units forming the city garrison were disarmed. Additionally, these elements of the division were ordered to identify depots, relocate prisoners of war to camps near Mukden, guard key locations, and maintain public order. Elements of the division remained in the city until 23 September; 36 detachments of the division were allocated for the escort of Japanese prisoners of war to Soviet territory. The division encountered no Japanese troops during its march through the Greater Khingan to Mukden. For its march through the Greater Khingan, the division was awarded the honorific Khingan after the end of the campaign. == Postwar ==