Campobello New Brunswick Irish-American Fenians Attack Campobello Island From Eastport, Maine

Irish-American Fenians launch a brief and unauthorized raid on Campobello Island, New Brunswick, from Eastport, Maine, on April 15, 1866. Part of a broader campaign by the Fenian Brotherhood to pressure Britain into granting Ireland independence, the action is intended to provoke conflict between the United States and Britain.

The incursion is short-lived: British warships and U.S. government agents intervene swiftly, and the Fenians are persuaded to withdraw peacefully. Though the raid fails, it heightens tensions in the region and reflects the transatlantic reach of Irish nationalist movements in the 19th century.