Liam filed his suit earlier this year after Noel accused him of missing their V Festival 2009 show in Chelmsford because he was hungover. Noel did eventually apologise and admitted Liam had been diagnosed with laryngitis, and it was thought that was the end of the matter.
However, Noel then lodged his defence on November 1, making a number of counter accusations.
The document includes claims that Liam left abusive messages on Noel’s wife Sara’s voicemail and once tried to attack him while wielding a guitar “like an axe”.
The brothers, who are thought to be worth £63 million between them, shot to fame with Oasis’ debut album Definitely, Maybe in 1994. The band went on to sell more than 70 million records worldwide.
From the very beginning of their rise to stardom, the pair displayed a tempestuous relationship, but it came to a head in August 2009 when the band split for good following a fight between the brothers backstage at Rock en Seine in Paris.
The papers filed by Noel also reveal that when the band did finally quit, he and Liam were not on speaking terms, and travelled separately to shows.
Noel’s lawyers also list 12 different occasions on which Liam allegedly disrupted gigs by storming out, being drunk or getting into fights.
The papers claim: “The claimant had a history over the years of … treating Oasis fans and the defendant with disrespect by disrupting gigs, including walking off stage, assaulting them and generally acting irresponsibly.”
Liam is now expected to pursue his action, and it is said the brothers could meet in court next summer.
A spokesman for Liam told The Mirror newspaper: “After Noel apologised the matter is now in the hands of lawyers.”