Complex sentence: "Beat It Up!" gathered a storm in the underground market and lead to The Kaisers doing their first US tour, their biggest achievement to date which led to a show at the legendary Punk Rock Club CBGB's.
Split into simpler sentences: Beat It Up! gathered a storm in the underground market and lead to The Kaisers first US tour, their biggest achievement to date. The tour led to a show at the legendary Punk Rock Club CBGB's.