The Fenian Rising of 1867: The Rebellion That Failed but Changed Ireland

In March 1867 the Irish Republican Brotherhood rose against British rule. It collapsed within days, yet its aftermath reshaped Irish politics.

29 July 2026 · Part of Irish Rebellions & the Road to Independence →

On the night of 5–6 March 1867, several thousand members of a secret oath-bound society called the Irish Republican Brotherhood marched out into one of the worst blizzards in living memory, converging on hilltops and police barracks across Ireland to launch a rebellion that had been years in the planning. By the following afternoon it was effectively over. The Fenian Rising, as it became known, never came close to matching the scale of bloodshed or ambition of the 1798 Rebellion seven decades earlier. Yet the movement behind it, the Irish Republican Brotherhood (IRB) and its American sister organization, the Fenian Brotherhood, left a deeper mark on Irish and British politics than its brief, disorganized skirmishes might suggest. Its failure in the field and its unexpected success in the court of public opinion set the template that Irish republicanism would follow for the next half-century, down to the Easter Rising of 1916.

A Secret Army Built on Cells

The Irish Republican Brotherhood was founded in Dublin on 17 March 1858 by James Stephens, a veteran of the failed 1848 Young Ireland rising who had spent years in exile in Paris absorbing the conspiratorial methods of continental secret societies. Stephens, who took the title "Head Centre," organized the IRB into a pyramid of oath-bound cells, or "circles": a colonel commanded nine captains, each captain commanded nine sergeants, and each sergeant commanded nine privates. In theory, no member below the top rank knew the identity of anyone outside his own small cell, which was meant to make the organization informer-proof. In practice, the Brotherhood would be undone again and again by paid spies who infiltrated it at every level.

Money and manpower came heavily from the Irish diaspora in the United States. In 1859, John O'Mahony, another veteran of 1848, founded the Fenian Brotherhood in New York as the American counterpart to Stephens's organization, taking its name from the Fianna, the legendary warrior-band of Irish mythology. The two organizations together became known simply as "the Fenians." Their cause received an unplanned boost from the American Civil War: when the war ended in 1865, the Fenian Brotherhood suddenly had access to thousands of Irish-born, combat-experienced veterans looking for a new fight, some of whom took part in botched Fenian raids across the Canadian border in 1866. In Ireland itself, the government moved first: in September 1865 it suppressed the Fenian newspaper The Irish People and arrested much of the IRB's leadership, and in February 1866 it suspended habeas corpus, allowing indefinite detention without trial. A rising planned for that year had to be postponed, and Stephens, increasingly seen by impatient subordinates as a man who talked of revolution but never delivered one, was deposed as Head Centre in December 1866.

Chester Castle: A Plan Betrayed

The new leadership settled on a bold opening move: seizing the arsenal at Chester Castle in England, which held some 10,000 rifles, then rushing the weapons to Holyhead and across the Irish Sea to arm the rising in Wexford. Organized by Captain John McCafferty, an Irish-American Civil War veteran, the plan drew well over a thousand Fenians, mostly Irish laborers from northern England's industrial towns, to converge on Chester on 11 February 1867. It never had a chance: an informer inside the movement, John Joseph Corydon, had already told the police everything, and reinforcements reached the castle before the Fenians could act. McCafferty sent word through the night for his men to disperse and make their way home as best they could; many were arrested trying to do so.

News of the postponement never reached the Fenians of south Kerry. On 12 February, a local rising went ahead anyway around Cahersiveen, led by Colonel John Joseph O'Connor, another Civil War veteran, who had returned home with a limp from a war wound. His small force attacked a coastguard station, shot and wounded a policeman, and set out toward Killarney before realizing no other county was rising alongside them. Within days the Kerry men had scattered.

The Night of the Snowstorm

The main rising finally came on the night of 5–6 March 1867, coinciding with a ferocious blizzard that buried roads and hillsides in snow and left poorly clothed rebels to stand watch through freezing rain and gales. What followed were gatherings and skirmishes rather than pitched battles, breaking out in County Dublin, Cork, Limerick, Clare, and Tipperary. The largest engagement came at Tallaght, outside Dublin, where several hundred Fenians marching toward a muster point ran into constabulary near the local barracks and were driven off, two of their number killed. At Kilmallock in County Limerick, roughly 500 Fenians under a self-styled "General Dunne" attacked the police barracks before dawn on 6 March; a mere fifteen constables, aided by their wives reloading rifles, held the building until the attackers gave up and fled. Estimates of the total turnout that night range up to several thousand, but the rebels were armed mostly with pikes and a scattering of rifles, with no coordinated command and no hope of resupply. By the next day, most had gone home; casualties on both sides were modest, and most rebel deaths came from gunfire or exposure to the cold rather than from any real battle.

Erin's Hope Arrives Too Late

Even the rising's promised reinforcements failed to arrive on time. On 23 May 1867, the ship Erin's Hope, carrying around forty armed Fenian officers, most of them American Civil War veterans, along with rifles and artillery pieces, sailed into Sligo Bay hoping to link up with local rebels. By then the rising had already been crushed for weeks, and no one came to meet them. The ship moved south along the coast to Waterford, where a small landing party went ashore and was quickly arrested; the rest sailed back to the United States, their weapons undelivered.

The Manchester Martyrs and the Clerkenwell Bomb

Militarily, the Fenian movement was finished by the spring of 1867. Politically, its most consequential moments were still to come, and they played out not in Ireland but in England. In September 1867, police in Manchester arrested two senior Fenians, Thomas J. Kelly and Timothy Deasy. A week later, Fenians ambushed the van transporting the prisoners to jail, breaking open the lock to free them; in the struggle, a police sergeant, Charles Brett, was shot and killed. Kelly and Deasy escaped for good, but five men were later tried for Brett's murder. Three of them, William Philip Allen, Michael Larkin, and Michael O'Brien, were hanged outside Salford Gaol on 23 November 1867 despite a public clemency campaign; a fourth, the American citizen Edward O'Meagher Condon, had his sentence commuted after his cry of "God save Ireland!" from the dock became an enduring slogan of Irish nationalism, later set to music as an unofficial anthem. The executed men entered nationalist memory as the "Manchester Martyrs."

Then, on 13 December 1867, Fenians attempted to blast open the wall of Clerkenwell Prison in London to free another leader, using a barrel of gunpowder. The explosion brought down not just the prison wall but nearby tenement housing, killing twelve civilians and injuring well over a hundred. It horrified British public opinion, triggered a wave of anti-Irish sentiment in English cities, and briefly made Fenianism a byword for terrorism in the London press. Paradoxically, it also convinced serious politicians that Irish grievances could no longer simply be ignored or suppressed by force.

Chronology of the 1867 Rising

Why the Rising Failed

Contemporaries and historians alike have pointed to the same handful of causes. The IRB's cellular structure, designed to defeat informers, never actually did: government agents such as Corydon reported on the movement's plans almost from the top down. Leadership was divided and indecisive, with Stephens removed for over-caution just months before the rising he had spent years postponing finally went ahead without him. Weapons were chronically short, and the arms that Chester and Erin's Hope were meant to supply never reached Irish hands. And the British state, forewarned repeatedly, had troops and constabulary positioned well ahead of time, so that what might have been a coordinated national insurrection became a series of isolated, quickly suppressed local skirmishes.

A Failure That Changed British Policy

The rising's true significance lay in what followed rather than what it achieved on the ground. William Gladstone, who became prime minister in 1868, later said his mission was to "pacify Ireland," and the shockwaves of 1867 helped push him toward genuine reform: disestablishment of the Church of Ireland in 1869 and the first Irish Land Act in 1870, which for the first time gave tenant farmers some legal protection against arbitrary eviction. An Amnesty Association campaigned successfully for the release of Fenian prisoners through the early 1870s. Former Fenians did not disappear from public life; Michael Davitt, who had served time for Fenian gun-running, went on to found the Irish National Land League in 1879 alongside Charles Stewart Parnell, fusing physical-force republicanism with parliamentary agitation in what became known as the "New Departure." The IRB itself survived underground for another half-century, its organizational core eventually providing much of the leadership behind the Easter Rising of 1916.

Conclusion

The Fenian Rising of 1867 was, by any conventional military measure, a failure: badly coordinated, thinly armed, and crushed within days by a government that had known about it well in advance. But its aftermath, playing out in courtrooms and on gallows in Manchester and amid the rubble of a London prison wall, did what the fighting itself could not, forcing Irish grievances back onto the British political agenda and supplying Irish nationalism with martyrs, a rallying cry, and an organizational network that would outlast the Victorian age.

The Fenians were far from the only nineteenth-century movement willing to meet economic and political grievance with direct action: in England, the Luddites had already shown how quickly industrial-age unrest could turn to organized violence, while across the Channel the short-lived Paris Commune of 1871 demonstrated how far a revolutionary government could go once it seized a capital, however briefly. Ireland's own tradition of armed rebellion against British rule stretched back at least as far as the 1798 Rising of the United Irishmen, and it would not end with the Fenians of 1867.

Frequently asked questions

What was the Fenian Rising of 1867? It was an armed rebellion against British rule in Ireland, organized by the secret Irish Republican Brotherhood and its American counterpart, the Fenian Brotherhood. The main rising took place on the night of 5–6 March 1867 in counties including Dublin, Cork, Limerick, Clare, and Tipperary, but poor coordination, informers, and a severe snowstorm meant it amounted to little more than scattered skirmishes that were suppressed within days.

Who were the Manchester Martyrs? William Philip Allen, Michael Larkin, and Michael O'Brien were three Fenians hanged in Manchester on 23 November 1867 for their part in a police sergeant's death during the rescue of two Fenian leaders from a prison van. Their executions, seen by nationalists as unjust, made them lasting symbols of the movement and inspired the rebel song "God Save Ireland."

Why did the Fenian Rising fail? The rising failed because British informers, most notably John Joseph Corydon, betrayed key plans in advance, including the attempt to seize arms at Chester Castle. Leadership was divided, weapons were scarce, and a severe blizzard on the night of the main rising further scattered poorly organized rebel bands who faced a British government and police force that had already been reinforced and forewarned.

What was the lasting impact of the Fenian Rising? Although militarily unsuccessful, the rising and its violent aftermath in England pushed Prime Minister William Gladstone toward Irish reform, including disestablishing the Church of Ireland in 1869 and passing the Irish Land Act of 1870. Former Fenians such as Michael Davitt later helped found the Land League, and the Irish Republican Brotherhood's underground network endured to help organize the Easter Rising of 1916.

Image: "The Fenian Rising in Ireland — Night Attack on the Police at Tallaght, March 5, 1867," a contemporary illustrated-press engraving. Public domain, via Wikimedia Commons.

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