Noel Gallagher has finally revealed the truth about his long-running feud with brother Liam Gallagher and the impact it had on Oasis splitting up.The group agreed to go their separate ways in 2009, and while the duo were known to have regular fall-outs over the years, fans were convinced they would eventually reunited. Noel called it quits after a confrontation with his younger brother, who recently suffered a fall out of a helicopter, at a French festival near Paris called the Rock en Seine.