Here's a look at Northern Ireland. For many years, Northern Ireland has been split over the question of whether it should remain part of the United Kingdom or become part of Ireland.
Belfast is the capital of Northern Ireland. The nation is part of the United Kingdom, along with England, Scotland and Wales.
Belief, religion and spirituality
Labor and employment
Catholics and catholicism
Crime, law enforcement and corrections
Elections and campaigns
Irish National Liberation Army
Protestants and Protestantism
Ulster Defence Association
Unrest, conflicts and war
US political parties
Crimes against persons
Government and public administration
International relations and national security
Political Figures - Intl
Treaties and agreements
Political Parties - Intl
Policing and police forces
Continents and regions
According to the 2011 Census, the most recent survey available, the population is 42% Protestant and other Christian and 41% Catholic. The other 17% are non-religious, did not state their religion (17%), or are members of other religions (.8%).
Northern Ireland's history has been marked by sectarian violence, although in recent years, its political parties have been working toward compromise and the two sides now make up a power-sharing government.
Between 1968 and 1998, sectarian violence left more than 3,600 people dead, according to the BBC. The conflict is often called "The Troubles."
Marching Season, a series of Protestant celebrations, takes place during the spring and early summer.
The Democratic Unionist Party (DUP)
Formed in 1971 by Ian Paisley, a Protestant preacher. Historically, it has attracted support from working-class Protestants.
Social Democratic and Labour Party (SDLP)
The party attracts middle-class Catholic support and aims to achieve the reunification of Ireland through democratic means.
Advocates a united Ireland free from British rule or a British presence.
Irish Republican Army
Founded in 1919 as a paramilitary group fighting for an independent Ireland. In 1969, the IRA split into the Official IRA and the Provisional IRA (the former rejected violence while the latter favored being an armed force). In 2005, the Provisional IRA announced that its military campaign was over, and its weapons would be scrapped.
1920 - The Government of Ireland Act splits the country into two separate political units, with Belfast as the capital of the north and Dublin as the capital of the south.
1949 - The Ireland Act establishes an independent Republic of Ireland in the south. The six counties of Northern Ireland remain a part of the United Kingdom.
January 30, 1972 - Thousands of people take part in a civil rights march in Derry. After a disturbance, the British Army fires shots into the crowd, killing 13 people (in addition, one injured man dies four months later). This day comes to be known as Bloody Sunday.
March 1972 - In the aftermath of Bloody Sunday, British Prime Minister Ted Heath suspends the Northern Ireland Parliament, imposing Direct Rule from London.
July 21, 1972 - Bloody Friday - The IRA sets off 19 bombs in Belfast, killing nine people.
1973 - A power-sharing arrangement called the Sunningdale Agreement is approved but a general strike in opposition to the agreement causes the deal to fall apart.
August 27, 1979 - Eighteen British soldiers are killed in two bombings. The same day, Lord Louis Mountbatten, a British admiral, and Queen Elizabeth II's cousin, dies after an IRA bomb explodes on his fishing boat.
May 1981 - Activist and hunger striker Bobby Sands dies of starvation in prison. His death sparks riots across Northern Ireland.
November 15, 1985 - Prime Minister Margaret Thatcher and Garret FitzGerald, the Irish prime minister, sign the Anglo-Irish Agreement, calling for collaboration between the British and Irish governments on matters related to politics, security and legal affairs in Northern Ireland. The agreement also calls for the promotion of cross-border cooperation.
1988 - The Irish peace process continues with a series of groundbreaking talks between SDLP leader John Hume and Gerry Adams, president of Sinn Féin.
August 1994 - The IRA announces a ceasefire.
April 10, 1998 - The Good Friday Agreement is signed, restoring self-government to Northern Ireland, and setting the stage to create their own power-sharing government with a 108-member Assembly.
August 15, 1998 - IRA militants bomb a market in the town of Omagh. The explosion kills 29 people. At the time, it is the single deadliest terrorist attack in the history of the conflict.
December 2, 1999 - Per the Good Friday Agreement, Britain relinquishes its rule over Northern Ireland.
2007 - The British Army ends its military operation in Northern Ireland, 38 years after troops were first dispatched to support police forces amid sectarian violence. At one point, approximately 27,000 soldiers were stationed in Northern Ireland.
June 15, 2010 - The results of the Saville Inquiry, a twelve-year investigation into the 1972 Bloody Sunday massacre are released, placing blame overwhelmingly on the British soldiers.
June 27, 2012 - Martin McGuinness, a former IRA commander, meets with Queen Elizabeth and shakes her hands, a gesture that signifies progress as the UK and Northern Ireland continue to repair relations.
June 17-18, 2013 - The G8 summit is held in Northern Ireland.
September 29, 2015 - Northern Ireland's Public Prosecution Service announces that it will not pursue criminal charges against Sinn Fein leader Gerry Adams and six other people who had been suspected of playing a role in the 1972 abduction and death of a Belfast widow. The mother of 10 was reportedly targeted because of fears that she was spying for the British army.
May 7, 2016 - The Northern Ireland Assembly election is held. The Democratic Unionists win 38 seats while Sinn Féin wins 28 seats in the power-sharing government.
June 23, 2016 - The majority of voters in Northern Ireland cast ballots to remain tied to the European Union in the Brexit referendum. While voters in Northern Ireland, London and Scotland predominantly choose to remain, large numbers of voters in Wales and the rest of England choose to leave. Ultimately the leave voters prevail with a 51.89% majority.
January 2017 - Following the resignation of deputy first minister Martin McGuinness, the British government faces snap elections for the Northern Ireland Assembly power-sharing administration.
March 2, 2017 - The Northern Ireland Assembly election is held. The Democratic Unionists win 28 seats while Sinn Féin wins 27 seats. The size of the Assembly is reduced from 108 members to 90.