On 15 July 1941 the army was transferred to the Front of the Reserve Armies and assisted top construct defensive works on the defensive line running through Selizharovo, Olenino, and Vasilievo.
The army fought in the Battle of Smolensk from the end of July to August 1941 and later formed part of the Western Front from 21 July. During the battle, 30th Army troops attacked Dukhovshchina from the region south-west of Bely. The army's attacks on the flanks of the German Ninth Army stopped and sapped the strength of the German forces. Between September and October the army fought in defensive operations around the region southwest of Bely on the Rzhev axis.
On 18 November army was again included into Western Front. As its army fought in the Klin-Solnechnogorsk Defensive Operation (15 November-5 December) and from 6 December on in the Klin–Solnechnogorsk Offensive Operation (6–25 December). During the operation 30th Army together with 1st Shock Army liberated Klin (15 December) and destroyed large German units.
As a part of Kalinin Front (from 17 December 1941) during January–April 1942 army participated in Rzhev-Vyazma Strategic Operation (8 January-20 April) In the end of operation army troops reached nearly to Rzhev and went on to the defence.
Later (from 31 August included into Western Front) until the end of 1942 army defended and strengthened its position going from time to time on the offensive.
In March 1943 troops of the army participated in the Rzhev–Vyazma Offensive Operation (2–31 March), subsequently liberating Rzhev and on 1 April reached the line Nefedovschina-Pantiukchy where it stopped to dig into defensive positions.
On 16 April the army was reformed into 10th Guards Army.
Colonel (promoted to Major General February 1943) Lev Sosedov (December 1942-April 1943)
References
^Sbornik Boevych Dokumentov Vielikoj Otczestviennoj Voiny wypisk 37 Prikaz Stawki Wierchnovo Komandowania nr 00305 ot 13 Julia 1941 o Sformirovaniu 30 Armii i jej zadaczach page 26
^Fugate Bryan, Lev Dvoriecki Blitzkrieg nad Dnieprem Bellona 2001 page 143