How the South African War transformed nationalist politics across Ireland's global diaspora In 1899, the British Empire embarked on a deeply controversial war against two small Boer Republics in South Africa. To many Irish nationalists, the Boers were fellow victims of British mistreatment. Defeat for the Boers, they worried, would mean defeat for the principle that small, white nations like Ireland were entitled to govern themselves. Widespread outrage sparked a dramatic resurgence in Irish nationalism after a decade of disunity and decline. The shape and strength of this revival varied throughout Ireland's vast global diaspora. Ireland's Opportunity traces the impact of "Boer fever" across Ireland and the diaspora networks that connected Irish communities in the United States, Canada, Australia, and New Zealand. Home Rulers reunited to oppose the war, even as those in Britain's colonies asserted their loyalty to the empire and its racist underpinnings. Fenian revolutionaries, meanwhile, saw "England's difficulty" in South Africa as "Ireland's opportunity" to strike for independence. Explosive conspiracies hatched in Ireland and the United States failed to kindle the desired revolution. But the lessons and legacies of the South African War years would shape their fateful response when "England's difficulty" returned after 1914. Blending global perspectives with intimate portraits of individuals whose lives were forever changed by the war, Shane Lynn reveals how Irish nationalism was a global phenomenon with a tangled and paradoxical relationship to empire.