Revolution and Partition
1916 AD – 1923 AD | The struggle for independence and the division of the island.
The Struggle for Independence
The struggle for Irish independence was a long and complex process, resulting in the division of the island into two separate states. This overview traces the key developments that led to the creation of the Irish Free State and Northern Ireland.
The Home Rule Crisis and World War I
At the beginning of the 20th century, the dominant political goal for most Irish nationalists was Home Rule, a form of limited self-government within the United Kingdom. The Irish Parliamentary Party (IPP), led by figures like John Redmond, had successfully maneuvered for the passage of the Third Home Rule Bill in 1914. However, the legislation was suspended due to the outbreak of World War I.
This push for Home Rule was met with fierce opposition from Unionists, particularly in the northern province of Ulster. They were overwhelmingly Protestant, economically tied to Britain's industrial heartland and feared being a minority in a Catholic-majority, self-governing Ireland. To resist Home Rule, Unionists formed the Ulster Volunteer Force (UVF), a paramilitary group that famously smuggled arms in the Larne gun-running. This armed resistance from Unionists essentially created a political stalemate and brought the island to the brink of civil war.
The Easter Rising (1916) and the Rise of Republicanism
While the Home Rule movement pursued constitutional change, a more radical nationalist faction was preparing for armed rebellion. The Irish Republican Brotherhood (IRB), a secret society dedicated to achieving a full Irish Republic, planned an uprising. On Easter Monday, 1916, a small number of rebels, including leaders like Pádraig Pearse and James Connolly, launched the Easter Rising in Dublin. They seized key buildings and proclaimed an independent Irish Republic.
The Rising was quickly suppressed by British forces, and its leaders were executed. This harsh response, however, backfired spectacularly. The executed leaders were transformed into martyrs and public opinion began to shift dramatically. The Rising is often seen as a pivotal moment, marking the beginning of the end for the constitutional Home Rule movement and the rise of a more militant Sinn Féin and the republican cause.
The War of Independence (1919-1921) and the Treaty
Following Sinn Féin's overwhelming victory in the 1918 general election, its elected members refused to take their seats in the British Parliament. Instead, they formed their own revolutionary parliament, Dáil Éireann, in Dublin in January 1919 and reaffirmed the declaration of independence. The Irish Volunteers (which had evolved into the Irish Republican Army, IRA) launched a guerrilla campaign against British forces, initiating the Irish War of Independence.
The war was a brutal and often savage conflict, characterised by ambushes, assassinations and reprisals. After two years of fighting, both sides were exhausted, leading to a truce in July 1921. Negotiations began, culminating in the signing of the Anglo-Irish Treaty in December 1921. The Treaty established the Irish Free State as a self-governing dominion within the British Empire.
The Civil War (1922-1923) and the Partition of Ireland
The Anglo-Irish Treaty was a deeply divisive document. Pro-treaty nationalists, led by figures like Michael Collins, saw it as a stepping stone to full independence, arguing that it gave Ireland "the freedom to achieve freedom". Anti-treaty republicans saw the Treaty as a betrayal of the Irish Republic declared in 1916. They objected to the oath of allegiance to the British monarch and the retention of British naval bases on the island.
This disagreement plunged Ireland into a bitter Civil War in 1922. The pro-treaty side, which controlled the newly formed Free State army, ultimately defeated the anti-treaty forces.
Simultaneously, the Treaty also addressed the "Ulster Question" by giving the six northeastern counties the right to opt out of the Free State. This was done via the Government of Ireland Act of 1920, which had already created a separate parliament for these counties. The new Northern Ireland parliament, dominated by Unionists, promptly exercised this right. The Boundary Commission, established to potentially redraw the border, ultimately failed to make any significant changes, cementing the division of the island. The Irish Free State was now a reality, but so was a separate, Unionist-controlled Northern Ireland.
The Easter Rising: A Republic Born of Blood
The Easter Rising of 1916 was a key moment in Ireland's struggle for independence, a short-lived armed rebellion that, despite its military failure, altered the course of Irish history. It marked a dramatic shift from constitutional nationalism to a more radical and uncompromising republicanism.
Planning and Execution
The Rising was meticulously planned by a small, secretive group within the Irish Republican Brotherhood (IRB), a revolutionary organisation committed to achieving an independent Irish Republic by force. Key figures in this group, known as the Military Council, included Pádraig Pearse, a schoolmaster and poet; Tom Clarke, an old Fenian veteran; and James Connolly
The IRB's strategy was to seize control of key positions in Dublin, not with the hope of a military victory against the vastly superior British forces, but to make a symbolic statement of armed rebellion. They believed that a "blood sacrifice" would reignite the nationalist passion of the Irish people, which they felt had waned with the focus on Home Rule. The plan called for a nationwide insurrection, with the main thrust in Dublin, to coincide with a German arms shipment arriving in County Kerry.
On Easter Monday, 24th April, 1916, around 1,600 members of the Irish Volunteers and Connolly's Irish Citizen Army launched the rebellion. The rebels, under Pearse's command, seized and fortified strategic locations in Dublin's city center. The main rebel headquarters was the General Post Office (GPO) on Sackville Street (now O'Connell Street). Other key positions included the Four Courts, the South Dublin Union, Jacob's Biscuit Factory and Boland's Mill. The nationwide aspect of the Rising failed almost completely, largely due to a countermanding order issued by Volunteer Chief of Staff Eoin MacNeill, who learned of the German arms shipment's interception and feared a massacre. This left the Dublin rebels isolated and alone.
Proclamation of the Irish Republic
At the start of the Rising, Pádraig Pearse, standing outside the GPO, read the Proclamation of the Irish Republic. This document was a powerful declaration of independence, outlining the ideals of the new state. It was a foundational text of Irish republicanism, asserting the right of the Irish people to the "ownership of Ireland" and promising to cherish all the children of the nation equally, regardless of religious or political differences. The Proclamation declared the establishment of a Provisional Government of the Irish Republic, signed by seven leaders of the Rising, all of whom would later be executed. This bold, public act was the moral and political heart of the rebellion, creating a new and uncompromising republican precedent.
The British military response was swift and overwhelming. Within hours of the Rising, thousands of troops and artillery were deployed against the outgunned and outnumbered rebels. The British army set up a cordon around the city centre and began systematically attacking the rebel-held positions. Artillery fire, particularly from the gunboat H.M.S. Helga on the River Liffey, destroyed the GPO and much of Sackville Street. After six days of fierce fighting, Pearse, recognising the futility of further resistance and seeking to save the lives of his followers, ordered a general surrender on Saturday, 29th of April.
The Turning Point: Defeat and Martyrdom
The Rising was a military disaster. It resulted in nearly 500 deaths, over 2,500 injuries and extensive damage to Dublin. In the immediate aftermath, public opinion was largely hostile to the rebels. Many Dubliners were frustrated by the disruption to their lives, the destruction of their city, and the fact that the Rising had occurred while many Irishmen were fighting in the British Army in World War I. The rebels were often jeered and abused by onlookers as they were marched away to prison.
The British military's handling of the aftermath was a catastrophic political blunder. The new commander-in-chief in Ireland, General Sir John Maxwell, insisted on court-martialing the rebel leaders. Starting on 3rd May, 1916, fourteen leaders, including all seven signatories of the Proclamation, were executed by firing squad in Kilmainham Gaol. The secrecy of the trials, the rapid pace of the executions and the perceived ruthlessness of the punishment for what many saw as a failed and isolated insurrection, began to turn the tide of public sentiment. The execution of James Connolly, who was so badly wounded he had to be tied to a chair to face the firing squad, was particularly shocking.
The executions created a new generation of martyrs. The leaders' final defiant speeches and letters were circulated widely, transforming them from failed revolutionaries into heroic patriots. The British government's brutal response had provided the "blood sacrifice" that the rebels had hoped for, not through the Rising itself, but through its aftermath. Public opinion swung from condemnation to sympathy, and then to outright support for the cause of an independent Irish Republic. The stage was set for the rise of Sinn Féin and the revolutionary period that would follow.
Sinn Féin and the 1918 Election
The 1918 general election was a watershed moment in Irish history, delivering an overwhelming mandate for independence to the republican party, Sinn Féin. This election marked a huge change in Irish politics, ending the era of constitutional nationalism and setting up for the Irish War of Independence.
The Decline of the Irish Parliamentary Party
For decades, the Irish Parliamentary Party (IPP), led by figures such as John Redmond, had been the voice of Irish nationalism, pursuing the goal of Home Rule through parliamentary means in Westminster. However, the IPP's fortunes had been in sharp decline since the Easter Rising of 1916. The British government's response to the rebellion, including the execution of its leaders, turned public opinion against the moderate IPP, which was seen as too compliant with British rule. The IPP was further damaged by its support for the British war effort and the subsequent conscription crisis in 1918, which saw a widespread rejection of British military authority in Ireland.
Sinn Féin, previously a marginal party, capitalised on this discontent. It rebranded itself as the political wing of the republican movement, fully embracing the goal of an independent Irish Republic, as proclaimed during the Rising. The party's platform was clear: it would abstain from taking any seats it won in the British Parliament and instead establish an Irish national assembly in Dublin.
A Staggering Victory
The general election in December 1918 was the first held under the Representation of the People Act 1918, which had significantly expanded to include all men over 21 and most women over 30. This tripled the Irish electorate, though research suggests this expansion of the vote was not the primary reason for Sinn Féin's victory. The party's success was more due to a fundamental change of heart among the Irish voters.
The results were a stunning landslide victory for Sinn Féin. Of the 105 parliamentary seats in Ireland, Sinn Féin won 73. In contrast, the Irish Parliamentary Party, which had dominated Irish politics for decades, was all but wiped out, winning just six seats. The Unionist parties retained a majority in the six counties that would later form Northern Ireland, but in the rest of the island, the message from the electorate was clear.
This victory gave Sinn Féin a powerful democratic mandate to pursue its separatist goals. The party's TD’s (Teachta Dála - Member of Parliament), under the leadership of Éamon de Valera, followed through on their promise. In January 1919, they met in Dublin to establish Dáil Éireann, the first parliament of the Irish Republic. This act was a direct rejection of British authority and marked the beginning of the Irish War of Independence, as the new Dáil began to govern in parallel with the existing British administration. The 1918 election, therefore, was not just a political event; it was the catalyst for a revolution.
The Irish War of Independence
The Irish War of Independence, was a brutal guerrilla conflict fought between British forces and the Irish Republican Army (IRA) from 1919 to 1921. It began after the overwhelming victory of Sinn Féin in the 1918 general election.
Formation of the Dáil and the IRA
Following the election, Sinn Féin TDs refused to take their seats in the British Parliament. Instead, they convened in Dublin's Mansion House on 21st January, 1919, to form Dáil Éireann, the first parliament of the Irish Republic. This act was a direct challenge to British rule. On the same day, the IRA's first shots were fired in Tipperary, starting the war. The IRA, which had evolved from the Irish Volunteers, became the official army of the new Dáil, though its actions were largely independent and decentralised.
Guerrilla Warfare and British Reprisals
The IRA, far outnumbered by the British Army, adopted a strategy of guerrilla warfare. They operated in small, mobile units known as "flying columns", typically composed of a dozen to two dozen men. These units used surprise attacks, ambushes and hit-and-run tactics to target British police barracks, soldiers and government officials. They relied on local support for food, shelter and intelligence, which made it nearly impossible for British forces to defeat them in conventional combat. The IRA's goal was not to win major battles but to make the British administration of Ireland unworkable and costly.
In response to the escalating violence, the British government significantly increased its military presence in Ireland.and recruited two notorious paramilitary forces:
- Black and Tans: These were ex-British soldiers, many of whom were veterans of World War I, recruited in 1920. Lacking proper uniforms, they were often clad in a mix of military khaki and dark police tunics, earning them their nickname. They were known for their indiscipline and brutality, often engaging in reprisals against the civilian population. Their actions, which included burning towns and villages, alienated many Irish people and turned international opinion against the British.
- Auxiliaries (Auxiliaries Division of the RIC): Also known as "Auxies", this force was composed of ex-officers from the British Army and was considered a more elite and better-disciplined fighting force than the Black and Tans. However, they were equally infamous for their harsh counter-insurgency tactics and were responsible for some of the most shocking acts of violence, including the Bloody Sunday massacre in November 1920.
The brutal tactics of these forces, which were often disproportionate and indiscriminate, had the unintended effect of strengthening support for the IRA and Sinn Féin. After two years of fighting, both sides were exhausted, leading to a truce in July 1921 and the eventual signing of the Anglo-Irish Treaty.
The Government of Ireland Act: The Partition of the Island
The Government of Ireland Act of 1920 was a landmark piece of British legislation that led to the formal partition of Ireland. Though it was intended to create two self-governing entities under the umbrella of the United Kingdom, its actual outcome was the creation of a separate Northern Ireland and the path to a fully independent Irish Free State.
The Context of the Act
By 1920, the British government faced a multifaceted crisis in Ireland. The constitutional Home Rule movement was in decline, replaced by the revolutionary republicanism of Sinn Féin. The Irish War of Independence was raging and the British administration in Ireland was collapsing under the weight of guerrilla warfare. Simultaneously, Unionists in Ulster had solidified their armed resistance to being included in a Home Rule Ireland. To solve this deadlock, the British government sought a compromise that would satisfy the competing demands of Irish nationalists and Ulster Unionists.
Key Provisions and the Partition
The Act's central provision was the division of Ireland into two separate territories:
- Northern Ireland: This was defined as the six northeastern counties of Ulster - Antrim, Armagh, Derry, Down, Fermanagh and Tyrone - where Unionists held a strong majority.
- Southern Ireland: This consisted of the remaining 26 counties of Ireland.
Both entities were to have their own bicameral parliaments (a House of Commons and a Senate) with powers to legislate on local matters. Key areas like defence, foreign policy and most taxes were "reserved" to the British Parliament at Westminster. The Act also created a Council of Ireland, with representatives from both parliaments, to facilitate cooperation and eventually provide a mechanism for reunification.
Divergent Outcomes
While the Act was designed to create two Home Rule parliaments within the UK, its implementation had drastically different outcomes in the North and South:
- Northern Ireland: Unionists accepted the Act, as it gave them the self-governing entity they had long sought to protect their interests. In the election of May 1921, they won a large majority in the new Northern Ireland Parliament and formed a government, solidifying their place in the United Kingdom.
- Southern Ireland: The Act was rejected outright by the vast majority of the population. Sinn Féin won an overwhelming number of seats in the election but treated it as an election for their revolutionary parliament, Dáil Éireann. The proposed Parliament of Southern Ireland never effectively functioned, with only a few Unionist members attending its single meeting.
The War of Independence continued until a truce was called in July 1921. The subsequent Anglo-Irish Treaty of December 1921 established the Irish Free State as an independent dominion, but it also gave Northern Ireland the right to opt out of the new Free State. The Northern Ireland Parliament promptly exercised this right in 1922, cementing the partition of the island. The Boundary Commission, established to potentially redraw the border, failed to make significant changes, making the 1920 Act's partition a permanent reality.
The significance of the Government of Ireland Act, therefore, lies not in its original intention but in its lasting consequence: the creation of a separate Northern Ireland and the division of the island, a political reality that continues to impact Irish and British politics to this day.
This video provides a concise explanation of the Government of Ireland Act of 1920 and its legacy.
The Anglo-Irish Treaty: The Birth of the Free State
The Anglo-Irish Treaty, signed on 6th December, 1921, ended the Irish War of Independence and established the Irish Free State. The treaty's terms and the subsequent divisions it created within the nationalist movement profoundly shaped the course of Irish history.
Negotiations and Terms
The negotiations began in London in October 1921 between representatives of the British government, led by Prime Minister David Lloyd George, and an Irish delegation from Dáil Éireann, led by Arthur Griffith and Michael Collins. The Irish delegates were under instruction from President Éamon de Valera to refer back to Dublin before signing any final agreement, an instruction they ultimately disregarded. The British government made it clear that a fully independent republic for all of Ireland was not an option and the talks were framed around the concept of dominion status within the British Empire.
The key terms of the treaty were:
- Establishment of the Irish Free State: A self-governing dominion of the British Empire, with the same constitutional status as Canada, Australia and other dominions.
- Oath of Allegiance: Members of the new Free State parliament (Oireachtas) were required to take an oath of allegiance to the Irish Free State and to King George V as the head of the British Commonwealth.
- Partition: Northern Ireland, which had been created by the Government of Ireland Act 1920, was given the option to opt out of the Free State within one month. It did, and a Boundary Commission was to be established to finalise the border between the two jurisdictions.
- British Military Ports: The British would retain control of three naval ports in the Free State, known as the "Treaty Ports".
- Governor-General: The British monarch would be represented in the Irish Free State by a Governor-General.
The Division and Civil War
The treaty's terms, particularly the oath of allegiance and the compromise on a fully independent republic, caused a bitter split in the Irish nationalist movement. The debate over the treaty raged in the Dáil Éireann for weeks.
- Pro-Treaty Side: Led by Michael Collins and Arthur Griffith, this faction argued that the treaty was a stepping stone to full independence. They believed that the alternative was a renewed and bloody war with Britain that the Irish Republican Army could not win.
- Anti-Treaty Side: Led by Éamon de Valera, this group rejected the treaty for failing to deliver a sovereign Irish Republic. They viewed the oath of allegiance as a betrayal of the 1916 Easter Rising and the War of Independence. They also opposed the partition of Ireland and the continued British military presence.
The split led to the Irish Civil War (1922–1923), which pitted former comrades against each other and resulted in the deaths of many key figures, including Michael Collins.
The Irish Civil War (1922-1923)
The Irish Civil War was a devastating conflict that began in the wake of the Anglo-Irish Treaty of 1921. It pitted former comrades-in-arms against one another over the future of the new Irish state, leaving a legacy of deep-seated animosity that influenced Irish politics for decades.
Pro-Treaty vs. Anti-Treaty Factions
The conflict was a clash between two factions with opposing views on the Anglo-Irish Treaty:
- The Pro-Treaty Faction supported the agreement and was led by Michael Collins and Arthur Griffith. They argued that the treaty was a pragmatic and necessary step toward greater autonomy, Collins famously calling it "the freedom to achieve freedom". They believed that Ireland lacked the resources to continue fighting Britain and that the treaty provided a secure foundation from which a fully independent republic could eventually be achieved. This group formed the core of the Provisional Government and its military wing, the National Army, which was supplied with weapons and artillery by the British.
- The Anti-Treaty Faction rejected the treaty, viewing it as a betrayal of the Irish Republic that had been proclaimed in 1916. Led by Éamon de Valera and other republican leaders, this group opposed the oath of allegiance to the British Crown, the continued British control of strategic naval ports and the partition of Ireland. They saw the establishment of the Irish Free State as a compromise that fell short for the many that had fought and died. This faction's forces, often referred to as the "Irregulars" were a significant portion of the Irish Republican Army.
Tragic Consequences and Lasting Bitterness
The war, which lasted from June 1922 to May 1923, was a period of intense and often brutal fighting. After initial conventional battles, the conflict devolved into a guerrilla campaign waged by the anti-treaty forces against the newly formed National Army. The fighting took a heavy human toll, claiming more lives than the preceding War of Independence.
The conflict was particularly tragic due to its dividing nature, with many former friends and families torn by the treaty. The Pro-Treaty government, seeking to establish its authority, implemented a policy of executions without trial, which further deepened the scars of the conflict. One of the most significant casualties was Michael Collins himself, who was ambushed and killed by anti-treaty forces in August 1922. The loss of key leaders on both sides, combined with the extreme measures taken, cemented a lasting bitterness. This bitterness endured for generations, shaping the political landscape and creating a social divide that would define Irish society for much of the 20th century.
The Establishment of the Irish Free State
The military phase of the civil war effectively ended in May 1923, when the anti-treaty forces, realising that victory was not possible, called a ceasefire and "dumped their arms". With the National Army victorious, the Provisional Government was able to fully establish the Irish Free State as a dominion within the British Commonwealth on 6th December, 1922. The pro-treaty side, led by W. T. Cosgrave formed the first official government, known as the Executive Council. The new state's constitution and political institutions were a direct result of the treaty's terms. Although the civil war had been won by the pro-treaty forces, the anti-treaty side, led by Éamon de Valera, would eventually re-enter politics, establishing the Fianna Fáil party and ultimately using constitutional means to dismantle many of the treaty's most contentious provisions, leading to the establishment of the Republic of Ireland in 1949.
Sources & Further Reading
The information on this page is compiled from established archaeological and historical research. For detailed reading, please consult the following sources:
- National Army Museum: Irish War of Independence.
- National Army Museum: Irish War of Independence.
- National Army Museum: Irish War of Independence.
- National Army Museum: Irish War of Independence.
- Wikipedia: Decolonization.
- Wikipedia: Easter Rising.
- Encyclopedia 1914-1918 Online: Easter Rising.
- Wikipedia: Easter Rising.
- Encyclopedia 1914-1918 Online: Easter Rising.
- Wikipedia: Easter Rising.
- Encyclopedia 1914-1918 Online: Easter Rising.
- Historians.org: Easter Rising.
- Wikipedia: Easter Rising.
- Encyclopedia 1914-1918 Online: Easter Rising.
- Historians.org: Easter Rising.
- Wikipedia: Easter Rising.
- Historians.org: Easter Rising.
- National Army Museum: Easter Rising.
- ResearchGate: The Easter Rising.
- UCC: Aftermath of the 1916 Rising.
- YIRA: Implications of the 1916 Easter Rising.
- Never Such Innocence: 1918 General Election.
- Wikipedia: 1918 UK General Election.
- Cambridge Core: Sinn Féin's Revolutionary Streak.
- UCC: Decline of Irish Parliamentary Party.
- Wikipedia: 1918 UK General Election in Ireland.
- Never Such Innocence: IPP Failure and Sinn Féin Support.
- RePEc: Franchise Reforms and Independence.
- Wikipedia: 1918 UK General Election.
- Wikipedia: 1918 Sinn Féin Election Manifesto.
- Wikipedia: 1918 UK General Election in Ireland.
- Queen's University Belfast: Electoral Reforms and Sinn Féin.
- Cambridge Core: Sinn Féin's Electoral Success.
- Cambridge Core: Representation of the People.
- Britannica: Sinn Féin.
- Never Such Innocence: 1910 vs. 1918 Elections.
- UCC: Victory of Sinn Féin.
- Never Such Innocence: Provisional Constitution.
- Wikipedia: Irish War of Independence.
- The Irish War: Sinn Féin Victory and Irish Republic.
- National Army Museum: Irish War of Independence.
- National Army Museum: Irish War of Independence.
- Encyclopedia 1914-1918 Online: Post-War Irish Conflict.
- Wikipedia: Black and Tans.
- Wikipedia: Black and Tans.
- Wikipedia: Black and Tans.
- The Irish War: Black and Tans.
- Wikipedia: Black and Tans.
- Britannica: Irish War of Independence.
- History Ireland: Government of Ireland Act 1920.
- Wikipedia: Government of Ireland Act 1920.
- Wikipedia: Government of Ireland Act 1920.
- Wikipedia: Government of Ireland Act 1920.
- Wikipedia: Government of Ireland Act 1920.
- Wikipedia: Government of Ireland Act 1920.
- Creative Centenaries: Government of Ireland Act.
- Wikipedia: Government of Ireland Act 1920.
- Law Society of Ireland: Government of Ireland Act.
- Creative Centenaries: Government of Ireland Act.
- Lords Library: Government of Ireland Act 1920.
- Lords Library: Government of Ireland Act 1920.
- Wikipedia: Partition of Ireland.
- Wikipedia: Government of Ireland Act 1920.
- Lords Library: Government of Ireland Act 1920.
- Commons Library: Government of Ireland Act 1920.
- National Archives: Irish Partition.
- National Museum of Ireland: Anglo-Irish Treaty.
- Britannica: Irish War of Independence.
- Oireachtas: Treaty Debates.
- Commons Library: Anglo-Irish Treaty.
- Wikipedia: Anglo-Irish Treaty.
- National Archives: Irish Partition.
- National Archives: Irish Partition.
- Wikipedia: Anglo-Irish Treaty.
- Britannica: Anglo-Irish Treaty.
- Wikipedia: Anglo-Irish Treaty.
- UCC: IRA, Split, and Anglo-Irish Treaty.
- National Museum of Ireland: Anglo-Irish Treaty.
- Britannica: Irish War of Independence.
- Britannica: Anglo-Irish Treaty.
- Britannica: Irish Civil War.
- British Online Archives: Irish Free State Establishment.
- EBSCO: Irish Civil War.
- The Irish War: Irish Civil War.
- The Irish War: Irish Civil War.
- Britannica: Irish Civil War.
- Wikipedia: Irish Civil War.
- Muckross House Research Library: Irish Civil War.
- UCC: IRA, Split, and Anglo-Irish Treaty.
- Wikipedia: Irish Civil War.
- The Irish War: Irish Civil War.
- EBSCO: Irish Civil War.
- Britannica: Anglo-Irish Treaty.
- Anglo Celt: Ireland's Civil War.
- Britannica: Irish Free State.
- Britannica: Irish Free State.
- Britannica: Irish Civil War.