Oasis were an English rock band formed in Manchester in 1991. Developed from an earlier group, the Rain, the band originally consisted of Liam Gallagher (lead vocals, tambourine), Paul “Bonehead” Arthurs (guitar), Paul “Guigsy” McGuigan (bass guitar), and Tony McCarroll (drums). Upon returning to Manchester, Liam’s older brother, Noel Gallagher (lead guitar, vocals) joined as a fifth member, which formed the band’s core and settled line-up. During the course of their existence, they had various line-up changes, though the Gallagher brothers remained as the staple members until the group’s dissolution.

Oasis signed to independent record label Creation Records in 1993 and released their record-setting debut album Definitely Maybe (1994). The following year the band recorded (What’s the Story) Morning Glory? (1995) with drummer Alan White, in the midst of a chart rivalry with Britpop peers Blur. (What’s the Story) Morning Glory? became one of the best-selling albums of all time, selling over 22 million copies worldwide, and the Gallagher brothers were featured regularly in tabloid newspapers for their sibling disputes and wild lifestyles.

In 1996, Oasis performed two nights at Knebworth for an audience of 125,000 each night, which were at the time the largest outdoor concerts in UK history. 2.5 million people applied for tickets, which remains the highest demand for a show in British history. In 1997, Oasis released their third album, Be Here Now (1997); although it was the fastest-selling album in UK chart history, and went on to sell 8 million copies, its popularity tapered off quickly.

Full Source : en.wikipedia.org/wiki/Oasis_(band)