Sinn Féin TD Pearse Doherty has called for a referendum on Irish neutrality following the Cabinet's decision to remove the Triple Lock.
The party's Spokesperson on Finance and Public Expenditure and Reform said Fine Gael has been saying for over 20 years that Ireland should move beyond neutrality.
He told RTÉ's Six One: "Their document was called 'beyond neutrality' and Fianna Fáil were calling them out at that time, saying the Triple Lock was integral to Irish neutrality, which we absolutely believe."
Earlier this week, the Government proposed the abolition of the Triple Lock which requires the approval of the Government, the Dáil and the United Nations Security Council before Irish troops are deployed on peacekeeping missions abroad.
Mr Doherty said Ireland needs to help reform the UN, that there are other ways in which a mandate can be given, for example through the General Assembly.
"But the idea that Fianna Fáil have just capitulated to Fine Gael and is now abandoning what is a core issue of Irish neutrality is something that will be resisted by Sinn Féin and many others," he added.
Mr Doherty said if the Government is so sure of its footing, it should let the people decide by way of a referendum on the issue of neutrality.
He said if the Government gets rid of the Triple Lock, it will mean that this Government or any future government could deploy Irish troops to any conflict in the world as long as they had a majority.
"And that's something I believe the Irish people would not want to see," he said.
