Last time we spoke about the beginning of the Nomohan incident. On the fringes of Manchuria, the ghosts of Changkufeng lingered. It was August 1938 when Soviet and Japanese forces locked in a brutal standoff over a disputed hill, claiming thousands of lives before a fragile ceasefire redrew the lines. Japan, humiliated yet defiant, withdrew, but the Kwantung Army seethed with resentment. As winter thawed into 1939, tensions simmered along the Halha River, a serpentine boundary between Manchukuo and Mongolia. Major Tsuji Masanobu, a cunning tactician driven by gekokujo's fire, drafted Order 1488: a mandate empowering local commanders to annihilate intruders, even luring them across borders. Kwantung's leaders, bonded by past battles, endorsed it, ignoring Tokyo's cautions amid the grinding China War. By May, the spark ignited. Mongolian patrols crossed the river, clashing with Manchukuoan cavalry near Nomonhan's sandy hills. General Komatsubara, ever meticulous, unleashed forces to "destroy" them, bombing west-bank outposts and pursuing retreats. Soviets, bound by pact, rushed reinforcements, their tanks rumbling toward the fray. What began as skirmishes ballooned into an undeclared war.

#189 General Zhukov Arrives at Nomohan

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Though Kwantung Army prided itself as an elite arm of the Imperial Japanese Army, the 23rd Division, formed less than a year prior, was still raw and unseasoned, lacking the polish and spirit typical of its parent force. From General Michitaro Komatsubara downward, the staff suffered a collective dearth of combat experience. Intelligence officer Major Yoshiyasu Suzuki, a cavalryman, had no prior intel background. While senior regimental commanders were military academy veterans, most company and platoon leaders were fresh reservists or academy graduates with just one or two years under their belts. Upon arriving in Manchukuo in August 1938, the division found its Hailar base incomplete, housing only half its troops; the rest scattered across sites. Full assembly at Hailar occurred in November, but harsh winter weather curtailed large-scale drills. Commanders had scant time to build rapport. This inexperience, inadequate training, and poor cohesion would prove costly at Nomonhan.

Japan's army held steady at 17 divisions from 1930 to 1937, but the escalating China conflict spurred seven new divisions in 1938 and nine in 1939. Resource strains from China left many under-equipped, with the 23rd, stationed in a presumed quiet sector, low on priorities. Unlike older "rectangular" divisions with four infantry regiments, the 23rd was a modern "triangular" setup featuring the 64th, 71st, and 72nd. Materiel gaps were glaring. The flat, open terrain screamed for tanks, yet the division relied on a truck-equipped transport regiment and a reconnaissance regiment with lightly armored "tankettes" armed only with machine guns. Mobility suffered: infantry marched the final 50 miles from Hailar to Nomonhan. Artillery was mostly horse-drawn, including 24 outdated Type 38 75-mm guns from 1907, the army's oldest, unique to this division. Each infantry regiment got four 37-mm rapid-fire guns and four 1908-era 75-mm mountain guns. The artillery regiment added 12 120-mm howitzers, all high-angle, short-range pieces ill-suited for flatlands or anti-tank roles. Antitank capabilities were dire: beyond rapid-fire guns, options boiled down to demolition charges and Molotov cocktails, demanding suicidal "human bullet" tactics in open terrain, a fatal flaw against armor.

The division's saving grace lay in its soldiers, primarily from Kyushu, Japan's southernmost main island, long famed for hardy warriors. These men embodied resilience, bravery, loyalty, and honor, offsetting some training and gear deficits. Combat at Nomonhan ramped up gradually, with Japanese-Manchukuoan forces initially outnumbering Soviet-Mongolian foes. Soviets faced severe supply hurdles: their nearest rail at Borzya sat 400 miles west of the Halha River, requiring truck hauls over rough, exposed terrain prone to air strikes. Conversely, Hailar was 200 miles from Nomonhan, with the Handagai railhead just 50 miles away, linked by three dirt roads. These advantages, plus Europe's brewing Polish crisis, likely reassured Army General Staff and Kwantung Army Headquarters that Moscow would avoid escalation. Nonetheless, Komatsubara, with KwAHQ's nod, chose force to quash the Nomonhan flare-up.

On May 20, Japanese scouts spotted a Soviet infantry battalion and armor near Tamsag Bulak. Komatsubara opted to "nip the incident in the bud," assembling a potent strike force under Colonel Takemitsu Yamagata of the 64th Infantry Regiment. The Yamagata detachment included the 3rd Battalion, roughly four companies, 800 men, a regimental gun company, three 75-mm mountain guns, four 37-mm rapid-fires, three truck companies, and Lieutenant Colonel Yaozo Azuma's reconnaissance group, 220 men, one tankette, two sedans, 12 trucks. Bolstered by 450 local Manchukuoan troops, the 2,000-strong unit was tasked with annihilating all enemy east of the Halha. The assault was set for May 22–23.

No sooner had General Komatsubara finalized this plan than he received a message from KwAHQ: "In settling the affair Kwantung Army has definite plans, as follows: For the time being Manchukuoan Army troops will keep an eye on the Outer Mongolians operating near Nomonhan and will try to lure them onto Manchukuoan territory. Japanese forces at Hailar [23rd Division] will maintain surveillance over the situation. Upon verification of a border violation by the bulk of the Outer Mongolian forces, Kwantung Army will dispatch troops, contact the enemy, and annihilate him within friendly territory. According to this outlook it can be expected that enemy units will occupy border regions for a considerable period; but this is permissible from the overall strategic point of view".

At this juncture, Kwantung Army Headquarters advocated tactical caution to secure a more conclusive outcome. Yet, General Michitaro Komatsubara had already issued orders for Colonel Takemitsu Yamagata's assault. Komatsubara radioed Hsinking that retracting would be "undignified," resenting KwAHQ's encroachment on his authority much as KwAHQ chafed at Army General Staff interference. Still, "out of deference to Kwantung Army's feelings," he delayed to May 27 to 28. Soviet air units from the 57th Corps conducted ineffective sorties over the Halha River from May 17 to 21. Novice pilots in outdated I 15 biplanes suffered heavily: at least 9, possibly up to 17, fighters and scouts downed. Defense Commissar Kliment Voroshilov halted air ops, aiding Japanese surprise.

Yamagata massed at Kanchuerhmiao, 40 miles north of Nomonhan, sending patrols southward. Scouts spotted a bridge over the Halha near its Holsten junction, plus 2 enemy groups of ~200 each east of the Halha on either Holsten side and a small MPR outpost less than a mile west of Nomonhan. Yamagata aimed to trap and destroy these east of the river: Azuma's 220 man unit would drive south along the east bank to the bridge, blocking retreat. The 4 infantry companies and Manchukuoan troops, with artillery, would attack from the west toward enemy pockets, herding them riverward into Azuma's trap. Post destruction, mop up any west bank foes near the river clear MPR soil swiftly. This intricate plan suited early MPR foes but overlooked Soviet units spotted at Tamsag Bulak on May 20, a glaring oversight by Komatsubara and Yamagata.

Predawn on May 28, Yamagata advanced from Kanchuerhmiao. Azuma detached southward to the bridge. Unbeknownst, it was guarded by Soviet infantry, engineers, armored cars, and a 76 mm self propelled artillery battery—not just MPR cavalry. Soviets detected Azuma pre dawn but missed Yamagata's main force; surprise was mutual. Soviet MPR core: Major A E Bykov's battalion roughly 1000 men with 3 motorized infantry companies, 16 BA 6 armored cars, 4 76 mm self propelled guns, engineers, and a 5 armored car recon platoon. The 6th MPR ...