The National Volunteers was the name taken by the majority of the Irish Volunteers that sided with Irish Parliamentary Party leader John Redmond after the movement split over the question of the Volunteers' role in World War I.
The National Volunteers were the product of the Irish political crisis over the implementation of Home Rule in 1912–14. The Third Home Rule Bill had been proposed in 1912 (and was subsequently passed in 1914) under the British Liberal government, after a campaign by John Redmond and the Irish Parliamentary Party. However, its implementation was delayed in the face of mass resistance by Irish Unionists. This had begun with the introduction of the bill into Parliament, when thousands of unionists signed the "Ulster Covenant", pledging to resist Home Rule. In 1913 they formed the Ulster Volunteers (UVF), an armed wing of Ulster Unionism and organised locally by the Orange Order; the Ulster Volunteers stated that they would resist Home Rule by force.
In response, Nationalists formed their own paramilitary group, the Irish Volunteers, at a meeting held in Dublin on 25 November 1913; the purpose of this new organisation was to safeguard the granting and implementation of Home Rule. It looked for several months in 1914 as if civil war was imminent between the two armed factions, with the British Army known to be reluctant to intervene against Ulster armed opposition to Home Rule's coming into operation. While Redmond took no role in the creation of the Irish Volunteers, when he saw how influential they had become he realised an independent body of such magnitude was a threat to his authority as leader of the Irish Parliamentary Party, and therefore sought control of the organisation.