In the early-to-mid '80s, several bands in the United States came to life that were inspired by the do-it-yourself ethics and the cathartic, guitar-heavy material characterized by the hardcore punk bands that predated them. These newer bands, termed post-hardcore, often found complex and dynamic ways of blowing off steam that generally went outside the strict hardcore realm of "loud fast rules." These bands often used more than three chords and they also creatively built and released tension rather than airing their dirty laundry in short, sharp, frenetic bursts. Additionally, many of these bands' vocalists were just as likely to deliver their lyrics with a whispered croon as they were a maniacal yelp. Another important influence on many of these bands was U.K. post-punk from the late '70s and early '80s; Gang of Four, Public Image Limited, Joy Division, and Wire played a significant role in many of the bands' musical growth. Some post-hardcore bands, like Fugazi and Quicksand, had roots in the beginnings of hardcore punk and were able to broaden their sound as they became more skilled musicians. Younger bands flowered into post-hardcore after cutting their teeth in high school punk bands. Chicago and Washington, D.C. were particularly fertile areas for this style, which has extended into the late 2000s.