What band's original name was Warsaw?

The band originally known as Warsaw was Joy Division.

The Manchester group formed in 1976 after guitarist Bernard Sumner and bassist Peter Hook attended the Sex Pistols' influential concert at the Lesser Free Trade Hall. With vocalist Ian Curtis and drummer Stephen Morris in the lineup, the band initially performed under the name Warsaw, inspired by David Bowie's instrumental "Warszawa."

Warsaw played its first concert in May 1977 and recorded demo material later that year. The musicians changed the name to Joy Division in early 1978 to avoid confusion with another London group called Warsaw Pakt. The new name was taken from the fictionalized term for a Nazi concentration-camp section in the 1953 novel House of Dolls, a choice that later became a source of controversy because of its association with Nazi persecution.

As Joy Division, the band released the albums Unknown Pleasures in 1979 and Closer in 1980. Curtis died shortly before Closer was released. The remaining members then continued as New Order, making Warsaw an important early name in the history of both bands.