 Complete the following phrase:  Sokrushitelny and Gremyashchy escorted Convoy PQ 8 into Kola Bay on 20 January and then formed part of the escort for Convoy QP 6 on 2428 January. Sokrushitelny was refitted from 20 February to 25 March. The same pair of destroyers were sent to escort Convoy PQ 13 four days later. Later that day the convoy was attacked by three destroyers of the 8th Destroyer Flotilla. Sokrushitelny briefly engaged , claiming at least one hit, which was later sunk by a British destroyer. From 10 to 12 April the sisters escorted the homeward-bound Convoy QP 10 and then the incoming Convoy PQ 14 from 17 to 19 April. They formed the local escort for Convoy QP 11 on 2830 April. After the light cruiser was torpedoed by a German submarine on 30 April, they reversed course to provide assistance. The destroyers were forced to return to port to refuel on 1 May and put to sea again on the morning of the following day, but returned to base when they received word that Edinburgh had already sunk. On 10 May Sokrushitelny bombarded German positions near the Zapadnaya Litsa River. She escorted Convoy QP 12 on 2123 May and then helped to escort 