Irish Civil War

The Irish Civil War was a conflict that took place from June 28, 1922, to May 24, 1923. It occurred immediately following the Irish War of Independence. This war was fought between two groups of Irish people. One group was the Provisional Government of Ireland. They supported the terms of the Anglo-Irish Treaty. The other group was the Anti-Treaty IRA. They believed the treaty failed to create a true republic.

The root of the war was the Anglo-Irish Treaty. This treaty ended the fighting between the Irish Republic and the United Kingdom. It created the Irish Free State, which was a self-governing state. However, the Free State was still a dominion of the British Empire. This meant the British monarch remained the head of state. The treaty also allowed Northern Ireland to opt out of the new state. Northern Ireland consisted of six counties: Fermanagh, Antrim, Tyrone, Derry, Armasm, and Down. These counties immediately returned to the United Kingdom. This division is known as the Partition of Ireland.

Many specific details in the treaty caused anger among Irish Republicans. Members of the new parliament, called the Oireachtas, had to take an Oath of Allegiance to the British monarch. Many felt this violated their oath to the Irish Republic. The treaty also allowed the British to keep strategic Treaty Ports. These ports on the coasts were to remain occupied by the Royal Navy. These issues caused a massive split in the Irish Republican Army. The disagreement was not just political; it was deeply personal. Many fighters had been close friends during the previous war.

Key leaders held very different views on the treaty. Michael Collins was the Irish finance minister and president of the Irish Republican Brotherhood. He argued that the treaty provided "the freedom to achieve freedom." He believed it was a stepping stone to full independence. On the other side, Éamon de Valera rejected the dominion status. De Valera had held secret discussions with British Prime Minister David Lloyd George. He believed the treaty was a betrayal of the 1916 Easter Rising. Collins felt the pressure of the decision. He famously wrote that he had signed his "death warrant."

Conflict began to escalate in the spring of 1922. On April 14, 200 Anti-Treaty IRA militants occupied the Four Courts in Dublin. Their spokesman was Rory O'Connor. They wanted to spark a new fight against the British. Michael Collins tried to avoid civil war by leaving the Four Courts garrison alone for a time. He wanted to wait for the results of a general election. However, the Provisional Government eventually moved to assert its authority. By early July, the pro-treaty National Army had secured Dublin.

The National Army used several advantages to win the war. They received substantial weapons from the British government. These included artillery and armored cars.

The National Army moved against strongholds in the south and west. This region was known as the "Munster Republic." By late August, the National Army had captured all urban centers. After this, the war entered a guerrilla phase. This involved small, mobile units instead of large battles. This phase lasted for ten more months. The war ended when the IRA leadership ordered all units to "dump arms."

The war left Irish society divided and embittered for many generations. The political landscape of modern Ireland is still shaped by this split. The three largest political parties are direct descendants of these opposing sides. Fine Gael grew from the pro-Treaty supporters. Fianna Fáil was formed by Éamon de Valera from the anti-Treaty republicans. Sinn Féin was formed by a minority of anti-Treaty republicans.

This history shows how a single treaty can change the course of a nation's politics forever.