Ulster Volunteers in the context of "Irish Volunteers"

The partition of Ireland (Irish: críochdheighilt na hÉireann) was the process by which the Government of the United Kingdom of Great Britain and Ireland (UK) divided Ireland into two self-governing polities: Northern Ireland and Southern Ireland. It was enacted on 3 May 1921 under the Government of Ireland Act 1920. The Act intended both territories to remain within the United Kingdom and contained provisions for their eventual reunification. The smaller Northern Ireland territory was created with a devolved government (Home Rule) and remained part of the UK. Although the larger Southern Ireland was also created, its administration was not recognised by most of its citizens, who instead recognised the self-declared 32-county Irish Republic.

Ireland had a largely Catholic nationalist majority who wanted self-governance or independence. Prior to partition, the Irish Parliamentary Party used its control of the balance of power in the British Parliament to persuade the government to introduce Home Rule Bills that would give Ireland a devolved government within the UK. This led to the Home Rule Crisis (1912–14), when Ulster unionists founded a large paramilitary organization (at least 100,000 men), the Ulster Volunteers, that could be used to prevent Ulster from being ruled by an Irish government. Although the Government of Ireland Act 1914 (to create a single administration) was passed, implementation was deferred due to the First World War (1914–18). Support for Irish independence grew during the war, particularly in the aftermath of the 1916 Easter Rising (an armed rebellion against British rule).

Unionism in Ireland is a political tradition that professes loyalty to the crown of the United Kingdom and to the union it represents with England, Scotland and Wales. The overwhelming sentiment of Ireland's Protestant minority, unionism mobilised in the decades following Catholic Emancipation in 1829 to oppose restoration of a separate Irish parliament. Since Partition in 1921, as Ulster unionism its goal has been to retain Northern Ireland as a devolved region within the United Kingdom and to resist the prospect of an all-Ireland republic. Within the framework of the 1998 Belfast Agreement, which concluded three decades of political violence, unionists have shared office with Irish nationalists in a reformed Northern Ireland Assembly. As of February 2024, they no longer do so as the larger faction: they serve in an executive with an Irish republican (Sinn Féin) First Minister.

Unionism became an overarching partisan affiliation in Ireland late in the nineteenth century. Typically Presbyterian agrarian-reform Liberals coalesced with traditionally Anglican, Orange Order allied, Conservatives against the Irish Home Rule Bills of 1886 and 1893. Joined by loyalist labour, on the eve of World War I this broad opposition to Irish self-government concentrated in Belfast and its hinterlands as Ulster unionism and prepared an armed resistance—the Ulster Volunteers.

The Home Rule Crisis was a political and military crisis in the United Kingdom of Great Britain and Ireland that followed the introduction of the Third Home Rule Bill in the House of Commons of the United Kingdom in 1912.

Unionists in Ulster determined to prevent any measure of home rule for Ireland and formed a paramilitary force, the Ulster Volunteers, which threatened to resist by force of arms the implementation of the Act and the authority of any Dublin Parliament. Irish nationalists responded by setting up the Irish Volunteers "to secure the rights and liberties common to all the people of Ireland". Both sides then began importing weapons and ammunition from Germany, in the Larne gun-running and Howth gun-running incidents. HM Government's ability to face down unionist defiance was thrown into question by the "Curragh incident", when dozens of British Army officers threatened to resign or face dismissal rather than deploy into Ulster (ostensibly to secure arms against Ulster loyalist seizure), forcing a climb-down by the government. The crisis was temporarily averted by the outbreak of World War I. The Home Rule Bill was enacted, but its implementation was suspended for the duration of the war.

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 (and formerly all of 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 (see Ulster nationalism). The term 'loyalism' is usually associated with paramilitarism.

Ulster loyalism emerged in the late 19th century, in reaction to the Irish Home Rule movement and the rise of Irish nationalism. Ireland had a Catholic majority who wanted self-government, but the province of Ulster had a Protestant and unionist majority, largely due to the Plantation of Ulster. Although not all unionists were Protestant, loyalists emphasised their British Protestant heritage. During the Home Rule Crisis (1912–14), loyalists founded the paramilitary Ulster Volunteers to prevent Ulster from becoming part of a self-governing Ireland. This was followed by the Irish War of Independence (1919–21) and partition of Ireland: most of Ireland became an independent state, while most of Ulster remained within the UK as the self-governing territory of Northern Ireland. During partition, communal violence raged between loyalists and Irish nationalists in Belfast, and loyalists attacked the Catholic minority in retaliation for Irish republican activity.

The Larne gun-running was a major gun smuggling operation organised in April 1914 in Ireland by Major Frederick H. Crawford and Captain Wilfrid Spender for the Ulster Unionist Council to equip the Ulster Volunteer Force. The operation involved the smuggling of almost 25,000 rifles and between 3 and 5 million rounds of ammunition from the German Empire, with the shipments landing in Larne, Donaghadee, and Bangor in the early hours between Friday 24 and Saturday 25 April 1914. The Larne gun-running may have been the first time in history that motor vehicles were used "on a large scale for a military purpose, and with striking success".