The work of the Irish Boundary Commission in 1924 and 1925 occupies a paradoxical position in Anglo-Irish history in the twentieth century. On the one hand, it was the only example of the post-war reordering of international boundaries, so in vogue after the Treaty of Versailles, to take place in the United Kingdom, but it also marked the beginning of a partition process also implemented by the British in further flung parts of the Empire, such as Palestine and India. That its recommendations were summarily buried by all three governments in London, Belfast and Dublin should not detract from the fact that these governments’ reaction to the Boundary Commission proposals marks the end of Britain’s direct involvement in Irish politics 125 years after the Act of Union. The irony is that for an exercise whose work and recommendations were immediately obliterated, thus forcing the three governments involved to pragmatically readopt the county boundaries of the Government of Ireland Act as the Irish boundary, it had so much impact on the course of Irish history for the next century. Article 12 of the Anglo-Irish Treaty establishing provision for the Boundary Commission may have been either deliberately ambiguous or simply casually drafted, but its stifled recommendations in 1925 certainly more effectively, in at least most cases, reflected the wishes of local inhabitants than the six-county boundary belatedly reconfirmed. For example, it is a sobering thought that, arguably, over two hundred lives may have been saved between 1969 and the mid-1990s if the Boundary Commission’s recommendation that nationalist South Armagh be transferred to the Free State had been enacted.