Coba jelasin Jun: Peningkatan dari Pertempuran Khalkhin Gol dalam bahasa melayu dong

Kedua-dua pihak mula membesarkan tentera mereka di kawasan ini: tidak lama lagi, Jepun mempunyai 30,000 orang di medan. Pihak Soviet menghantar komander kor yang baru, Comcor Georgy Zhukov, yang tiba pada 5 Jun dan membawa lebih banyak pasukan bermotor dan perisai (Kumpulan Tentera I) ke zon pertempuran.  Mengiringi Zhukov adalah Comcor Yakov Smushkevich dengan unit penerbangan beliau. J. Lkhagvasuren, Kor komisar Tentera Revolusi Rakyat Mongolia, telah dilantik sebagai timbalan Zhukov.

On 27 June, the Japanese Army Air Force's 2nd Air Brigade struck the Soviet air base at Tamsak-Bulak in Mongolia. The Japanese won this engagement, but the strike had been ordered by the Kwantung Army without getting permission from Imperial Japanese Army (IJA) headquarters in Tokyo. In an effort to prevent the incident from escalating, Tokyo promptly ordered the JAAF not to conduct any more air strikes against Soviet airbases.

Throughout June, there were reports of Soviet and Mongolian activity on both sides of the river near Nomonhan and small-scale attacks on isolated Manchukoan units. At the end of the month, the commander of the 23rd Japanese Infantry Division, Lt. Gen. Komatsubara, was given permission to "expel the invaders".