 Complete the following phrase:  On 20 December, Lieutet Colonel Nikolai Polyatkov became the division commander. At the end of 1942, the 270th became part of the 18th Separate Rifle Corps. From 18 January, the division fought in the OstrogozhskRossosh Offensive, capturing Novy Oskol. At the beginning of February, the corps became the 69th Army. The 270th fought in Operation Star, the advance on Kharkov, entering Kharkov Oblast on 3 February. On 9 February, it captured Volchansk and developed the attack towards the city. The 270th participated in the capture of Kharkov on 16 February and began advancing on Bogodukhov. The division fought in the 