Trivial this may be but while researching for the 'What Happened Today' thread I came across something I hadn't realised before.. In December 1944 Bomber Command launched a series of 'Main Force' attacks on the Urft Dam in the Eifel. It's interesting to compare the relative effort : - 617 Squadron sent 19 aircraft on the Dams Raid in May 1943, losing 8 but destroying two dams. In total, 5 & 8 Group despatched 544 sorties (! ) to the Urft Dam, achieving only 13ft of masonry dislodged from the top of the dam but losing only 2 aircraft. A 'blunt instrument' indeed....