Oasis was a British rock band formed in Manchester in 1991, known for their role in the Britpop movement of the 1990s. The band, led by brothers Liam Gallagher (vocals) and Noel Gallagher (guitar and primary songwriter), became one of the most successful and influential British rock bands of all time. They are famous for their anthemic, guitar-driven sound, catchy melodies, and rock 'n' roll attitude, often drawing comparisons to The Beatles. Oasis was formed after Liam Gallagher joined a band called The Rain, which eventually became Oasis.

Noel Gallagher joined shortly after and brought with him a cache of songs that would define the band's sound. Their breakthrough came with their debut album, "Definitely Maybe" (1994), which became the fastest-selling debut album in the UK at the time. The album was praised for its raw energy, attitude, and songs that defined a generation.

The band's second album, "(What's the Story) Morning Glory?" (1995), cemented their status as superstars, both in the UK and internationally. It became one of the best-selling albums in UK history. In 1997, Oasis released "Be Here Now", one of the most anticipated albums in British music history. It sold record-breaking numbers upon release but received mixed reviews in the years that followed, with some critics considering it bloated and overproduced. While it initially achieved massive success, the album marked the beginning of the end for the Britpop movement.

The constant fighting between Liam and Noel finally led to Oasis splitting up in 2009 after a backstage altercation in Paris. Noel quit the band, stating that he could no longer work with his brother. After the breakup, Noel formed Noel Gallagher's High Flying Birds, and Liam formed Beady Eye, though neither reached the heights of Oasis.

Oasis is often cited as one of the greatest and most influential British bands of all time. Their music defined the Britpop movement and became the soundtrack for a generation in the 1990s. They revived British guitar music at a time when grunge and alternative rock dominated the scene and inspired countless artists with their swaggering rock 'n' roll attitude, memorable melodies, and stadium-sized anthems. Oasis’s influence continues to resonate in popular culture, with their music remaining timeless and beloved by fans around the world. Their songs, particularly "Wonderwall," have become cultural touchstones, and the ongoing speculation about a potential reunion only adds to their enduring legacy.