Paine would also play an important role inside the revolution in France as an elected member of the National Convention (1792–3), where he lobbied for an invasion of Britain to establish a republic after the example of the United States, France and its Sister Republics, but also opposed the execution of Louis XVI, which got him arrested. The First French Republic would indeed stage an Expedition to Ireland in December 1796 to help the Society of United Irishmen set up an Irish republic in order to destabilise the United Kingdom, but this ended in a failure. The subsequent Irish Rebellion of 1798 was utterly crushed by the British Army. Napoleon also planned an invasion of Britain since 1798 and more seriously since 1803, but in 1804 he relinquished republicanism by crowning himself Emperor of the French and converting all Sister Republics into client kingdoms of the French Empire, before calling off the invasion of Britain altogether in 1805.