Answer the question at the end by quoting:

ZZ Top is an American rock band formed in 1969 in Houston, Texas. The band has, since 1970, consisted of bassist and lead vocalist Dusty Hill, guitarist and lead vocalist Billy Gibbons (the band's leader, main lyricist and musical arranger), and drummer Frank Beard. "As genuine roots musicians, they have few peers", according to former musician, critic and collector Michael "Cub" Koda. "Gibbons is one of America's finest blues guitarists working in the arena rock idiom [...] while Hill and Beard provide the ultimate rhythm section support."
The original line-up was formed in Houston and consisted of Gibbons, organist Lanier Greig (died February 2013) and drummer Dan Mitchell. The name of the band was Gibbons' idea. The band had a little apartment covered with concert posters and he noticed that many performers' names utilized initials. Gibbons particularly noticed B.B. King and Z.Z. Hill and thought of combining the two into "ZZ King", but considered it too similar to the original name. He then figured that "king is going at the top" which brought him to "ZZ Top". ZZ Top was managed by Bill Ham, a Waxahachie, Texas native who had befriended Gibbons a year earlier. They released their first single, "Salt Lick", in 1969, and the B-side contained the song "Miller's Farm". Both songs were credited to Gibbons. Immediately after the recording of "Salt Lick", Greig was replaced by bassist Billy Ethridge, a band-mate of Stevie Ray Vaughan, and Mitchell was replaced by Frank Beard of the American Blues. Due to lack of interest from U.S. record companies, ZZ Top accepted a record deal from London Records. Unwilling to sign a recording contract, Ethridge quit the band and Dusty Hill was selected as his replacement. After Hill moved from Dallas to Houston, ZZ Top signed with London in 1970. They performed their first concert together at the Knights of Columbus Hall in Beaumont on February 10. In addition to assuming the role as the band's leader, Gibbons became the main lyricist and musical arranger. With the assistance of Ham and engineer Robin Hood Brians, ZZ Top's First Album (1971) was released and exhibited the band's humour, with "barrelhouse" rhythms, distorted guitars, double entendres, and innuendo. The music and songs reflected ZZ Top's blues influences. Following their debut album, the band released Rio Grande Mud (1972), which failed commercially and the promotional tour consisted of mostly empty auditoriums.

what is the most important fact in this article?

In addition to assuming the role as the band's leader, Gibbons became the main lyricist and musical arranger.

IN: Rise Against is an American melodic hardcore band from Chicago, Illinois, formed in 1999. The band's current line-up comprises vocalist/rhythm guitarist Tim McIlrath, lead guitarist Zach Blair, bassist Joe Principe and drummer Brandon Barnes. Former members are guitarists Dan Wlekinski, Kevin White, Todd Mohney and Chris Chasse, and drummer Toni Tintari. The band spent its first four years signed to the independent record label Fat Wreck Chords, on which they released two studio albums, The Unraveling (2001) and Revolutions per Minute (2003).

Rise Against was formed in 1999, by bassist Joe Principe and guitarist Dan Wleklinski. Before Rise Against, Principe and Wleklinski were members of the Chicago punk rock band 88 Fingers Louie. This band toured and recorded to moderate success, but disbanded on two separate occasions in the late 1990s. Following the second breakup, Principe and Wleklinski decided to form a new band called Transistor Revolt, and recruited drummer Toni Tintari, guitarist Kevin White, and lead vocalist Tim McIlrath. Principe met McIlrath in Indianapolis while attending a Sick of It All concert, and recalled seeing him perform with his previous band Baxter. Impressed with McIlrath's gritty vocals, Principe gave him a seven track demo he had recorded, and invited him to join the nascent band. McIlrath accepted the invitation, and dropped out of Northeastern Illinois University. The initial jam sessions were problematic, as McIlrath was unaccustomed to Principe and Wleklinski's fast-paced style of play. McIlrath described these early sessions as "the meeting of different worlds and worlds colliding", and noted how many of his friends questioned the future of the band. Despite these early issues, they were able to self-publish the extended play (EP) Transistor Revolt in 2000. The EP attracted the attention of the local punk community, including Fat Mike, the lead vocalist of NOFX and co-founder of the independent record label Fat Wreck Chords. Fat Mike offered to sign the band to a recording contract, with the stipulation that they change their name. He gave some suggestions, like Jimmy Cracked Corn And The I Don't Cares, although none of the band members liked them. Tintari suggested Rise Against, to which the band agreed upon. After signing with Fat Wreck Chords, Tintari and White left the band. The remaining members then spent the next few months looking for another drummer capable of playing double-time beats at a rapid pace. During this period, the band Good Riddance found their new drummer, and sent Rise Against the audition tape of their number two choice, Brandon Barnes. A mutual friend gave Barnes' phone number to Principe, and after listening to Transistor Revolt, Barnes accepted the band's invitation.

Did they have any issues that would later cause them problems?

OUT:
but disbanded on two separate occasions in the late 1990s.