The Ulster special constabulary and the Royal Ulster Constabulary were both established in 1920
The first elections for the Northern Ireland parliament took place in 1921 and the parliament was officially opened on 22nd June 1921 by King George V
In 1932, The Northern Ireland parliament moved into a new building at Stormont. The building was opened by Edward, the Prince of Wales
In January 1939, the IRA began a bombing campaign in the UK. The Irish government outlawed the IRA
The Northern Ireland Parliament banned the flying of the Irish Tricolour in 1954
In 1955, the Irish Republic offered people born in Northern Ireland after 1922 citizenship
The Ulster Volunteer Force (UVF) was founded in Northern Ireland in 1966
The Belfast 'peace line' was established in 1969 by the British army
In 1970, the Republican movement split into the Official IRA and the Provisional IRA
The DUP (Democratic Unionist Party) was formed by the Rev, Ian Paisley in 1971
On the 27th August 1974, the Guildford bombing by the IRA in the UK killed five people. A further 21 people were killed in the Birmingham pub bombings, the IRA were also responsible
Lord Mountbatten and three others were killed in the Mullaghmore boat bombing in 1979. Eighteen British soldiers were killed the same day in an attack at Warrenpoint, County Down
In 1981, Several people including Bobby Sands, the MP for South Fermanagh died during the IRA hunger strike at the Maze prison which lasted from the 9th March to the 3rd October
In October 1984, the IRA were responsible for bombing the British Conservative Party Conference
On the 15th November 1985 at Hillsborough, the Anglo-Irish agreement was signed between the Republic of Ireland and the UK
Eleven people were killed in Enniskillen by a bomb while attending a remembrance day service in 1987
In 1991, the 'Birmingham Six' were released from prison in England after being wrongly accused of the 1974 pub bombings
The IRA bomb London's Canary Warf in 1996, ending their ceasefire
The Good Friday Agreement was signed by all Northern Ireland parties in 1998