find targets due to bad weather. On 28 March 1942, during a raid against Lübeck, one crew shot down Junkers Ju 88 night fighter. On the night of 30/31 May 1942, fourteen aircraft took part in a thousand-bomber raid against Cologne (Operation Millennium), without losses. This was Arthur Harris' first large formation raid. On the night of 2/3 June the squadron took part in the second thousand-bomber raid on Essen, losing one crew, but in another smaller scale Essen raid on 5/6 June two crews were lost. On 25/26 June fourteen crews bombed Bremen in last thousand-aircraft raid, losing a crew of the squadron commander Stanisław Krzystyniak (taken prisoners). On 2/3 July yet another two crews were lost over Bremen, with the new squadron commander Maj. Maksymilian Brzozowski, who was taken prisoner as well. Over the night of 21/22 July, another two crews were lost to enemy flak and night fighters over Duisburg. In total, six crews were lost in June and five in July 1942, making these months the worst in the squadron's history. From end of May 1942 the squadron also performed low-level night mining sorties against German waters, in addition to the airwar over Germany. After one loss in August and two losses in October in such sorties, the squadron temporarily had only 6 experienced crews and 6 in training or incomplete ones. On 20/21 November and 9/10 December 1942 the squadron took part in raids against Torino in Italy. In 1942 in total it performed 739 missions, losing 24 crews. In first months 1943 it continued operations, and from 5 March 1943 participated in the Battle of the Ruhr, but it was only able to send 5-6 aircraft a night. The squadron's last raid was performed against Bochum on 29/30 March 1943. In 1943 it undertook 107 missions, losing one crew. Because of losses suffered in 1942 and limited possibility of Polish replacements, in March Polish and British authorities decided to disband the unit and transfer the crews and ground crew mainly to No. 300 Polish Bomber Squadron, which was undergoing a conversion to Avro Lancaster heavy bombers. On 1 April 1943 the squadron was withdrawn from operation, and on 7 April 1943 reduced to a sole number. In Bomber Command the squadron had completed 1326 aircraft missions in total, dropping 3,217,553 pounds of bombs (1470.4 tons) and 499,500 pounds of mines (228.2 tons), losing 35