Roy's rows with the FAI
Roy Keane has been appointed assistant manager of the Republic of Ireland.
The former Republic captain will have to work closely with the Football Association of Ireland establishment that he previously railed against.
Here is a look back at the biggest row of Keane's international career.
Keane is sent home from the Republic's pre-World Cup training camp after an explosive row with manager Mick McCarthy.
In an interview with the Irish Times, Keane says he will quit international football after the World Cup having expressed his dissatisfaction with the preparations in Saipan.
When clear-the-air talks with McCarthy descend into a "slanging match", the Republic boss promptly sends his best player home.
The then Manchester United midfielder says: "I don't feel an ounce of guilt about my part in what has happened.
"Apologies? I don't think I should be apologising. If anything, I believe the apologies are for others to apologise to me."
McCarthy replies in the Mail on Sunday, saying Keane's attitude in his tirade against him was "obnoxious, degrading to me and downright rude".
"There was no dignity and precious little respect in his choice of language. I have never witnessed such an attack from any human being," McCarthy says.
"It was vicious and it was unjust. I looked at him as he waded in with one expletive after another and I asked myself if this was my captain; if this was one of my players."
Keane goes on Irish television and suggests a rapprochement, but FAI treasurer John Delaney says: "I can't see it. I have watched parts of the interview and don't see any change.
"I think the FAI must respect the decision of Mick McCarthy and his players."
Keane, during his spell as manager of Ipswich, returns to old ground after saying he has little sympathy for the FAI's bid to have the controversial World Cup play-off against France replayed.
He dismisses its calls for "the honesty and integrity" of the sport to be protected in the wake of Thierry Henry's handball which led to France's winner in Paris.
He says: "I think the supporters deserve better, the manager (Giovanni Trapattoni) deserves better and probably most of the players deserve better, but I'm not sure the FAI deserve better."
Keane raps Delaney, now chief executive of the FAI, as he speaks again about the 2002 World Cup drama.
"People seem to forget what was going on in that World Cup, and that man (Delaney) is on about honesty. I was one of the players and he didn't have the courtesy to ring me," Keane says.
"I'd been involved with Ireland since I was 15 years of age and that man didn't have the decency to make a phone call. He could have phoned me, of course he could have."
Delaney, still chief executive of the FAI, says he and incoming assistant manager Keane have put the past behind them.
Speaking on Newstalk Radio, Delaney says: ''It's years ago, there should be a line drawn in the sand in terms of Saipan and what happened. We were all younger people back then.
''I think we all say things in different parts of our life. I'm sure you or I have said things that we regret.
''But anything that would have been said by Roy or I to each other or about each other is irrelevant, it's irrelevant. Irish football and our country is bigger than anything.''