the 399th on its right flank, burst open the German defenses at the boundary between the 134th and 36th Infantry Divisions east of Zareche on January 20. The two rifle divisions then pushed forward west of the village of Molcha by the end of the next day. After six days of intense fighting, 48th Army's shock group managed to advance between five and ten kilometres on a front of roughly . 42nd Corps was regrouped and ordered to attack northwestward toward Dubrova, Yasvin and Sosnovka, west and northwest of Shatsilki, beginning on January 24. This renewed attack caught the Germans off-balance as they were preparing new defenses. In four more days of heavy fighting the 399th captured Zareche the next day, then fought a seesaw battle for Dubrova on January 26/27. Despite giving up considerable ground the 36th Infantry finally halted the Corps' advance at Sosnovka. By day's end on January 27 the most advanced elements of 48th Army were just from the outskirts of Parichi. But this had come at a cost, and Rokossovsky called a temporary halt on that date, with the offensive to resume on February 2. The new effort, during which 42nd Corps was in second echelon, made only limited gains in four days of combat, and another halt was called on February 6. On the 14th the Army began the first of two local offensives to improve its positions, gaining only about before being stalled again by German reinforcements. The second began early in the morning of February 22. The 399th was one of eight understrength rifle divisions, backed by about 70 tanks of the 1st Guards Tank Corps, that again struck a German divisional boundary and then drove north and northwest before being halted on the 24th. During this winter the division was receiving infantry replacements from the 146th Reserve Rifle Regiment. In March the 42nd Corps, with the 399th, came under the command of 50th Army in the renamed 1st Belorussian Front. During April the Corps was again reassigned, now to the Front's 3rd Army, before returning to 48th Army in June. Operation Bagration During the Soviet summer offensive the 42nd Corps, now consisting of the 399th, 170th and 137th Rifle Divisions, was concentrated north of Rogachev to assist its partner 29th Corps and units of the 3rd Army to break through the positions of the German 134th and 296th Infantry Divisions. The