Edited sentence: 3 Group RAF stated the attacks failure and casualties was a result of poor formation flying and leadership.After the Polish Campaign the General Staff had assessed the problems of leadership, tactics, command and control.But the German reported stated that the rigid formation flying had actually worked in their favour, allowing them to chose the position and angle of attack.But the Luftwaffe was to busy congratulating itslef on its success rather than learning any operational lessons.On 22 Decmber No.Others maintained that poor beam defensive armament and self sealing fuel tanks were neaded.Tactically the Germans noted the same lessons, particularly the poor beam defences of Wellington bombers.The German report regarded the attempt by the RAF to attack in clear conditions as altitudes of 3,000 to 5,000 metres (13,000 to 16,500 feet) as "criminal folly".The historian for the General Staff noted it was only exploited for propaganda despite the operational problems and warnings the battle had flagged for attacker and defender.The tactical assessment of both sides was radically different.Within a few weeks, a debate began on shifting air attacks to the cover of darkness