Last time we spoke about General Zhukov's armor offensives at Nomohan. Following heavy Japanese losses in May and June, General Georgy Zhukov arrives in June, reorganizes the Soviet 1st Army Group, and bolsters it with tanks, artillery, and reinforcements. The July offensive sees General Komatsubara's forces cross the Halha River undetected, achieving initial surprise. However, General Yasuoka's tank assault falters due to muddy terrain, inadequate infantry support, and superior Soviet firepower, resulting in heavy losses. Japanese doctrine emphasizing spiritual superiority clashes with material realities, undermining morale as intelligence underestimates Soviet strength. Zhukov learns key lessons in armored warfare, adapting tactics despite high casualties. Reinforcements pour in via massive truck convoys. Japanese night attacks and artillery duels fail, exposing logistical weaknesses. Internal command tensions, including gekokujo defiance, hinder responses. By August, Stalin, buoyed by European diplomacy and Sorge's intel, greenlights a major offensive. Zhukov employs deception for surprise. Warnings of Soviet buildup are ignored, setting the stage for a climactic encirclement on August 20.

#191 Zhukov Steel Ring of Fire at Nomohan

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On the night of August 19–20, under cover of darkness, the bulk of the Soviet 1st Army Group crossed the Halha River into the expanded Soviet enclave on the east bank. Two weeks of nightly Soviet sound effects had paid off: Japanese perimeter troops failed to distinguish the real deployment from the frequently heard simulations. Zhukov's order of battle was as follows: "Northern force, commanded by Colonel Alekseenko—6th Mongolian Cavalry Division, 601st Infantry Regiment (82nd Division), 7th Armored Brigade, 2 battalions of the 11th Tank Brigade, 82nd Artillery Regiment, and 87th Anti-tank Brigade. Central force, where Zhukov was located, commanded by his deputy, Colonel Petrov—36th Motorized Infantry Division, 82nd Infantry Division (less one regiment), 5th Infantry Machine Gun Brigade. Southern force, commanded by Colonel Potapov—8th Mongolian Cavalry Division, 57th Infantry Division, 8th Armored Brigade, 6th Tank Brigade, 11th Tank Brigade (less two battalions), 185th Artillery Regiment, 37th Anti-tank Brigade, one independent tank company. A mobile strategic reserve built around the 212th Airborne Regiment, the 9th Mechanized Brigade, and a battalion of the 6th Tank Brigade was held west of the Halha River."

The Soviet offensive was supported by massed artillery, a hallmark of Zhukov's operations in the war against Germany. In addition to nearly 300 antitank and rapid-fire guns, Zhukov deployed over 200 field and heavy artillery pieces on both sides of the Halha. Specific artillery batteries were assigned to provide supporting fire for each attacking infantry and armored unit at the battalion level and higher. In the early hours of August 20, the sky began to lighten over the semiarid plain, with the false promise of a quiet Sunday morning. The air was clear as the sun warmed the ground that had been chilled overnight. General Komatsubara's troops were in no special state of readiness when the first wave of more than 200 Soviet bombers crossed the Halha River at 5:45 a.m. and began pounding their positions. When the bombers withdrew, a thunderous artillery barrage began, continuing for 2 hours and 45 minutes. That was precisely the time needed for the bombers to refuel, rearm, and return for a second run over the Japanese positions. Finally, all the Soviet artillery unleashed an intensive 15-minute barrage at the forwardmost Japanese positions. Komatsubara's men huddled in their trenches under the heaviest bombardment to which they or any other Japanese force had ever been subjected. The devastation, both physical and psychological, was tremendous, especially in the forward positions. The shock and vibration of incoming bombs and artillery rounds also caused their radiotelegraph keys to chatter so uncontrollably that frontline troops could not communicate with the rear, compounding their confusion and helplessness.

At 9:00 a.m., Soviet armor and infantry began to move out along the line while their cover fire continued. A dense morning fog near the river helped conceal their approach, bringing them in some sectors to within small-arms range before they were sighted by the enemy. The surprise and disarray on the Japanese side was so complete, and their communications so badly disrupted, that Japanese artillery did not begin firing in support of their frontline troops until about 10:15 a.m. By then, many forward positions were overrun. Japanese resistance stiffened at many points by midday, and fierce combat raged along the front, roughly 40 miles long. In the day's fighting, Colonel M. I. Potapov's southern force achieved the most striking success. The 8th MPR Cavalry Division routed the Manchukuoan cavalry holding Komatsubara's southern flank, and Potapov's armor and mechanized infantry bent the entire southern segment of the Japanese front inward by about 8 miles in a northwesterly direction.

Zhukov's central force advanced only 500–1,500 yards in the face of furious resistance, but the frontal assault engaged the center of the Japanese line so heavily that Komatsubara could not reinforce his flanks. Two MPR cavalry regiments and supporting armor and mechanized infantry from Colonel Ilya Alekseenko's northern force easily overran two Manchukuoan cavalry units guarding the northern flank of the Japanese line, about 2 miles north of the Fui Heights. But the heights themselves formed a natural strong point, and Alekseenko's advance was halted at what became the northern anchor of the Japanese line. As the first phase of the Soviet offensive gathered momentum, General Ogisu, the 6th Army's new commander, assessed the situation. Still unaware of Zhukov's strength, he reassured KwAHQ that "the enemy intends to envelop us from our flanks, but his offensive effectiveness is weak… Our positions in other areas are being strengthened. Set your mind at ease." This optimistic report contributed to Kwantung Army's delay in reinforcing the 23rd Division. Some at KwAHQ suspected this might be another limited Soviet push, like Aug 7–8, that would soon end. Others worried it was a diversion prior to a larger offensive and were concerned but not alarmed about Komatsubara's position.

On Aug 21–22, Potapov's southern force pierced the Japanese main defense line at several points, breaking the southern sector into segments that the attackers sealed off, encircled, and ground down. Soviet armor, mechanized infantry, and artillery moved swiftly and with deadly efficiency. Survivors described how each pocket of resistance experienced its own hellish period. After the Japanese heavy weapons in a pocket were neutralized, Soviet artillery and tanks gradually tightened the ring, firing at point-blank range over open sights. Flame-throwing tanks incinerated hastily constructed fortifications and underground shelters. Infantry mopped up with grenades, small arms, and bayonets. By the end of Aug 23, Potapov had dismembered the entire Japanese defensive position south of the Holsten River. Only one significant pocket of resistance remained. Meanwhile, Potapov's 8th Armored Brigade looped behind the Japanese, reaching southeast of Nomonhan, some 11 miles east of the river junction, on the boundary claimed by the MPR, and took up a blocking position there athwart the most likely line of retreat for Japanese units south of the Holsten.

In those two days, the Japanese center yielded only a few yards, while the northern flank anchored at Fui Heights held firm. Air combat raged over the battlefield. Soviet air units provided tactical support for their armor and infantry, while Kwantung Army's 2nd Air Group strove to thwart that effort and hit the Soviet ground forces. Before Nomonhan, the Japanese air force had not faced a modern opponent. Japanese fliers had roamed largely unchallenged in Manchuria and China from 1931 to 1939. At Nomonhan, the Soviets enjoyed an advantage of roughly 2:1 in aircraft and pilots. This placed an increasingly heavy burden on Japanese air squadrons, which had to fly in...