Mezue ahịrịokwu na-esonụ: N'oge nile nke July 1943, ọnụ ọgụgụ buru ibu nke Lancasters keere òkè ná mwakpo na-ebibi ihe gburugburu elekere na obodo nke Hamburg n'oge Air Chief Marshal Harris
"Ọrụ Gọmọra". Otu ọrụ a ma ama nke Lancaster rụrụ bụ ọrụ nke 16-17 Mee 1943, nke a na-akpọ Operation Chastise, iji bibie mgbochi mmiri nke Ruhr Valley. Ndị ọrụ nke 617 Squadron rụrụ ọrụ ahụ na Mk IIIs gbanwere nke na-ebu bọmbụ pụrụ iche na-atụgharị, nke onye injinia Britain bụ Barnes Wallis mere. E mesịrị mee akụkọ banyere ọrụ ahụ n'otu ihe nkiri, "The Dam Busters".