The bombing of Hamburg in 1943 also produced impressive results. Attacks on Tiger I heavy tank production, and of that of 88mm guns, the most potent dual-purpose artillery piece in the "Wehrmacht", meant that output of both was "set back for months". On top of this, some 62 percent of the population was dehoused causing more difficulties. However, RAF Bomber Command allowed itself to be distracted by Harris' desire for a war winning blow, and attempted the fruitless missions to destroy Berlin and end the war by spring, 1944.