This article records tradition as it has been passed down and reported. Its sources are not yet part of the atlas's verified catalogue.
Northern Ireland was created in 1921 with a built-in Protestant and unionist majority, and for the next half-century its Catholic and nationalist minority faced systematic discrimination in housing, employment and voting rights. A civil rights movement modeled on the American example began organizing marches in 1968, and the violent response of police and loyalist counter-demonstrators to those marches is generally taken as the conflict's opening chapter. British troops were deployed to Northern Ireland in August 1969, initially to protect the Catholic community, and the Provisional Irish Republican Army split from the original IRA that same winter, committed to an armed campaign for a united Ireland.
The three decades that followed saw bombings, assassinations and gun battles carried out by republican and loyalist paramilitaries alike, internment without trial, and episodes such as Bloody Sunday in January 1972, when British soldiers shot dead thirteen unarmed civilians at a civil rights march in Derry, that hardened republican recruitment for a generation. Multiple rounds of political negotiation through the 1970s and 1980s failed to produce a lasting settlement.
The Good Friday Agreement of April 1998 finally established power-sharing government and cross-border institutions, and was endorsed by referendums on both sides of the Irish border. Paramilitary decommissioning followed over the subsequent years, though the deep communal segregation the conflict left behind, in housing, schooling and public space, persisted long after the shooting stopped.