The Troubles: Ulster loyalists resumed a picket outside a Catholic girls' primary school in the Protestant portion of Ardoyne, in Belfast, Northern Ireland.

The Troubles were an ethno-nationalist conflict in Northern Ireland that lasted for about 30 years from the late 1960s to 1998. Also known internationally as the Northern Ireland conflict, it began in the late 1960s and is usually deemed to have ended with the Good Friday Agreement of 1998. Although the Troubles mostly took place in Northern Ireland, at times violence spilled over into parts of the Republic of Ireland, England, and mainland Europe.

Ulster loyalism is a strand of Ulster unionism associated with working class Ulster Protestants in Northern Ireland. Like other unionists, loyalists support the continued existence of Northern Ireland within the United Kingdom, and oppose a united Ireland independent of the UK. Unlike other strands of unionism, loyalism has been described as an ethnic nationalism of Ulster Protestants and "a variation of British nationalism". Loyalists are often said to have a conditional loyalty to the British state so long as it defends their interests. They see themselves as loyal primarily to the Protestant British monarchy rather than to British governments and institutions, while Garret FitzGerald argued they are loyal to 'Ulster' over 'the Union'. A small minority of loyalists have called for an independent Ulster Protestant state, believing they cannot rely on British governments to support them. The term 'loyalism' is usually associated with paramilitarism.

The Holy Cross dispute occurred in 2001 and 2002 in the Ardoyne area of north Belfast, Northern Ireland. During the 30-year conflict known as the Troubles, Ardoyne had become segregated – Ulster Protestants and Irish Catholics lived in separate areas. This left Holy Cross, a Catholic primary school for girls, in the middle of a Protestant area. In June 2001 – during the last week of school before the summer break – Protestant loyalists began picketing the school, claiming that Catholics were regularly attacking their homes and denying them access to facilities.