Passage: Def Leppard's debut album, On Through the Night, was released on 14 March 1980. Ọ bụ ezie na album kụrụ n'elu 15 na UK, ọtụtụ ndị mbụ Fans e gbanyụọ site na echiche na ìgwè ahụ na-agbalị kwa ike na-arịọ ndị American na-ege ntị site na Ndekọ songs dị ka "Ekele America" na-eme njem ọzọ na US (na-akwado Pat Travers, AC / DC, na Ted Nugent); a arụmọrụ na Reading Festival na August e mebiri mgbe ndị na-ege ntị kwupụtara ha iwe site pelting ìgwè ahụ na biya mkpọ na karama jupụtara na mmamịrị. Nke a na-n'ụzọ ụfọdụ na-ata ụta na a mkpuchi akụkọ na ụda akwụkwọ akụkọ site na music odeakụkọ Geoff Barton isiokwu, "Nwere Leppard gbanwere ya tụrụ?", ebubo ìgwè mmadụ na-ere si na American ahịa.
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