"Pro-Treaty" refers to the political stance that supports the Anglo-Irish Treaty of 1921, which established the Irish Free State as a self-governing entity within the British Empire. Pro-Treaty supporters believed that the treaty was a significant step towards Irish independence and stability, as it provided a framework for governance and economic development. The Pro-Treaty faction was led by figures such as Michael Collins and Arthur Griffith, who argued that the treaty offered a practical solution to the long-standing conflict between Ireland and Britain. Their position ultimately led to a split in the Irish Republican movement, contributing to the Irish Civil War that followed.