The Proclamation of Dungannon was a document produced by Sir Phelim O'Neill on 24 October 1641 in the Irish town of Dungannon.[1] O'Neill was one of the leaders of the Irish Rebellion, which had been launched the previous day. O'Neill's Proclamation set out a justification of the uprising. He claimed to have been given a commission signed and sealed on 1 October by the King of Ireland Charles I that commanded him to lead Irish Catholics in defence of the Kingdom of Ireland against Protestants who sympathised with Charles's opponents in the Parliament of England.