Question: Decommissioning in Northern Ireland was a process in the Belfast Agreement as part of the Northern Ireland peace process, the Northern Ireland peace process is often considered to cover the events leading up to which year, Provisional Irish Republican Army (IRA) ceasefire, the end of most of the violence of the Troubles, the Good Friday (or Belfast) Agreement of 1998, and subsequent political developments?

Context articles: Principle of consent
Joe Cahill
Northern Ireland peace process
Decommissioning in Northern Ireland
Paul Magee
Good Friday Agreement
Omagh bombing
Brendan Duddy
Martina Anderson
Dissident republican

Principle of consent is a term used in the context of the Northern Ireland peace process and is one of the key points of the Good Friday Agreement.
 The principle states both the legitimacy of the aspiration to a United Ireland and the legitimacy of the wish of the majority of the people of Northern Ireland to remain part of the United Kingdom.
 The doctrine also underlines the right of self-determination for the people of both jurisdictions in Ireland, Northern Ireland and the Republic of Ireland, without external interference, and only with the consensus of a majority of people in both polities.
Joe Cahill (Irish: Seosamh Ó Cathail ; 19 May 1920 – 23 July 2004) was a prominent figure in the Irish Republican movement in Northern Ireland and former chief of staff of the Provisional Irish Republican Army (IRA).
 He joined a junior-republican movement, Na Fianna Eireann, in 1937 and the following year, joined the Irish Republican Army.
 In 1969, Cahill was a key figure in the founding of the Provisional Irish Republican Army.
 During his time in the Provisional IRA, Cahill helped import weapons and raise financial support.
 He served as the chief of staff in 1972, but was arrested the following year when a ship importing weapons was intercepted.
 After his release, he continued to serve on the IRA Army Council and lead all financial dealings for Sinn Féin.
 In the 1990s, the IRA and Sinn Féin began to work on seeking peace.
 Cahill served on the council that called a cessation on 21 July 1996.
 Cahill attended several of the talks that finally led to the Good Friday Agreement on 10 April 1998.
 Shortly after the agreement was made, Cahill resigned as treasurer of Sinn Féin.
 To honour his service, he was made honorary Sinn Féin Vice-President for life.
The Northern Ireland peace process is often considered to cover the events leading up to the 1994 Provisional Irish Republican Army (IRA) ceasefire, the end of most of the violence of the Troubles, the Good Friday (or Belfast) Agreement of 1998, and subsequent political developments.
Decommissioning in Northern Ireland was a process in the Belfast Agreement as part of the Northern Ireland peace process.
 Under the Belfast Agreement, all paramilitary groups fighting in the Troubles would decommission.
 Decommissioning was a defining issue in the effort to negotiate peace in Northern Ireland.
Paul "Dingus" Magee (born 30 January 1948) is a former active service volunteer in the Belfast Brigade of the Provisional Irish Republican Army who escaped during his 1981 trial for killing a member of the Special Air Service (SAS) in 1980.
 After serving a prison sentence in the Republic of Ireland, Magee fled to England where he was imprisoned after killing a policeman in 1992.
 He migrated to the Republic of Ireland as part of the "Northern Ireland peace process" before being released from prison in 1999, and subsequently avoided extradition back to Northern Ireland to serve his sentence for killing the member of the SAS.
The Good Friday Agreement (GFA) or Belfast Agreement (Irish: "Comhaontú Aoine an Chéasta" or "Comhaontú Bhéal Feirste"; Ulster-Scots: "Guid Friday Greeance" or "Bilfawst Greeance") was a major political development in the Northern Ireland peace process of the 1990s.
 Northern Ireland's present devolved system of government is based on the agreement.
 The agreement also created a number of institutions between Northern Ireland and the Republic of Ireland, and between the Republic of Ireland and the United Kingdom.
The Omagh bombing was a car bombing that took place on 15 August 1998 in Omagh, County Tyrone, Northern Ireland.
 It was carried out by a group calling themselves the Real Irish Republican Army, a Provisional Irish Republican Army (IRA) splinter group who opposed the IRA's ceasefire and the Good Friday Agreement.
 The bombing killed 29 people (including a woman pregnant with twins) as well as injuring some 220 others, a death toll even higher than that of any single incident during what were considered 'the Troubles' (1968-10 April 1998).
 Telephoned warnings had been sent about 40 minutes beforehand, but were claimed to be inaccurate and police had inadvertently moved people towards the bomb.
Brendan Duddy (10 June 1936 – 12 May 2017) was a businessman from Derry, Northern Ireland, who played a key role in the Northern Ireland peace process.
 A notable Catholic republican, who was a pacifist and firm believer in dialogue, Duddy became known by MI6 as "The Contact."
 In his book "Great Hatred; Little Room – Making Peace in Northern Ireland", Tony Blair's political advisor Jonathan Powell described Duddy as the "key" which led to discussions between republicans and MI6, and ultimately the Northern Ireland peace process.
Martina Anderson (born 16 April 1962) is an Irish politician in Northern Ireland who is a Member of the European Parliament (MEP) representing Northern Ireland for Sinn Féin.
 She became involved in the Irish Republican movement in the late 1970s, is a former volunteer of the Provisional Irish Republican Army (IRA) and was in prison for IRA activity for 13 years until she was released as a condition of the Good Friday Agreement.
 After her release, she became involved in politics for Sinn Féin.
 She was a Member of the Legislative Assembly of Northern Ireland from 2007 to 2012, representing Foyle.
 She served in the Northern Ireland Executive as a Junior Minister at the Office of the First Minister and Deputy First Minister from 2011 to 2012.
 In 2012 she became a Member of the European Parliament, and she was reelected in the 2014 election.
Dissident republicans, renegade republicans, anti-Agreement republicans or anti-ceasefire republicans (Irish: "poblachtach easaontach" ) are Irish republicans who do not support the current peace agreements in Northern Ireland.
 The agreements followed a 30-year conflict known as the Troubles, which claimed over 3,500 lives.
 During the conflict, republican paramilitary groups such as the Provisional Irish Republican Army waged a campaign to bring about a united Irish republic.
 Peace negotiations in the 1990s led to an IRA ceasefire in 1994 and to the Good Friday Agreement of 1998.
 Mainstream republicans, represented by Sinn Féin, supported the Agreement as a means of achieving Irish unity peacefully.
 'Dissidents' saw this as an abandonment of republican ideals and acceptance of partition and British rule.
 They hold that the Northern Ireland Assembly and Police Service of Northern Ireland (PSNI) are illegitimate and see the PSNI as a "British paramilitary police force".